Circumstances that play a part;
1. Lay people with jhana and path attainments are a minority
2. Monks with jhana and path attainments are a minority
3. The vast majority of people is filled to the brim with delusion, greed, anger and conceit and are to that extent guaranteed not to react adequately to any such claims
4. Ariyans have nothing to prove and don't owe anybody anything
5. Ariyans knowing their own benefit are more likely to look for their superior or solitude than seeking to associate with non-Ariya
6. People without attainments tend to have preconceived notions about attainments they don't have, quite often they just deny the existence of attainments altogether
7. People have a tendency to overestimate themselves due to conceit
8. People with attainments are not hiding it but have little incentive to announce it
9. They won't generally announce it if it is going to inconvenience them
10. There is a Buddhist establishment in form of Institutions which are influenced and have influence on governments and to that extent there is invested interest, politics and hierarchy.
11. Most "Buddhists" show reverence to and follow the established norms and authority.
12. Most "Buddhists" are not learned enough to have an educated opinion on validity of interpretations let alone having knowledge of the points of controversy
Anguttara Nikaya Sutta 8.51, the Buddha said the True Dhamma will last five hundred years. This means it will be pure and unadulterated during this period only.
In Samyutta Nikaya Sutta 16.13 the Buddha warned that counterfeit Dhamma will arise in the world, just like counterfeit gold, causing the True Dhamma to disappear.
When the Buddha was about to enter parinibbana he instructed the monks “…. What I have taught and explained to you as Dhamma Vinaya, that will be your Teacher after I am gone. “ (Digha Nikaya Sutta 16).
In Samyutta Nikaya Sutta 20.7, the Buddha also predicted that in the future the monks will not listen to, study, or master, the discourses of the Buddha. Instead they prefer to listen to, study, and master the discourses of disciples (i.e. later monks), thus causing the disappearance of the Buddha’s Dhamma.
Anguttara Nikaya Sutta 4.180 the Buddha said that if any monk claims that “This is Dhamma, this is Vinaya, this is the Master’s teaching”, his words should neither be accepted nor rejected. Instead, they should be compared to the Suttas (discourses) and Vinaya of the Buddha.
According to Chabbisodhana Sutta; The Buddha said that when any bhikkhu claimed to the attainment of Arahatship, his claim should not be admitted or rejected outright. His claim should be carefully scrutinized according to the text.
Suppose a monk were to say: "Friends, I heard and received this from the Lord's own lips: this is the Dhamma, this is the discipline, this is the Master's teaching", then, monks, you should neither approve nor disapprove his words. Then, without approving or disapproving, his words and expressions should be carefully noted and compared with the Suttas and reviewed in the light of the discipline. If they, on such comparison and review, are found not to conform to the Suttas or the discipline, the conclusion must be: "Assuredly this is not the word of the Buddha, it has been wrongly understood by this monk", and the matter is to be rejected. But where on such comparison and review they are found to conform to the Suttas or the discipline, the conclusion must be: "Assuredly this is the word of the Buddha, it has been rightly understood by this monk.
18. Given that what is designated as classical Theravada includes 5th Century commentarial works and thus material therein far exceeds the 500 years of unadulterated Dhamma it follows that people should also scrutinize the Commentarial works but most people don't do this. Therefore should anybody claim high attainment and be found to contradict Commentary this person will certainly be rejected as a "fake" on that basis even tho it may turn out to be a vain and baseless accusation.
19. When comparing Commentary to Sutta quite often even learned people fail to acknowledge reasonable doubt and are making unreasonable assertions for various reasons such as stupidity, confirmation bias or just a logical fallacy.
Due to these circumstances talking about attainments is complicated.
Also the way it seems to me that the doctrine is corrupted is from the top down meaning that it is the highest attainments that become misunderstood and misrepresented first before minor and more obvious points like ie should monks use money or not.