Isn’t the leap of logic made in the first paragraph exactly the same spurious reasoning and post hoc fallacy decried in the second paragraph? No where in the cite you gave does it say that removing the earwax alleviates the symptoms. It is an inferrence to logically juxtapose these claims and a fallacy in and of itself to presume that the claimed mechanics are 1. The accurate mechanics of performance and 2. The assumed mechanics when no such statement is directly made.
I do understand how the material for the leap of logic has been provided by the claimant (huckster) for those who wish to feel good about themselves by putting two and two together either for or against the product. But, this misdirection aside, specific claims are specific claims and there are plenty of examples of obviously false specific claims on the web w/re. ear candling.
As to the mechanics of ear candling themselves, I have already mentioned treatment with smoke (not with suction) as a possibility. The resulting effects could easily be due to the smoke, or the warmth, or one of the constituants of the smoke. Another possibility is inducing sensitization and returning to a state of resting hearing during the process. This can be duplicated by going through a normal day with normal exposures and getting a hearing test done, then lying quietly on a table with ear plugs (or fingers or whatever) in each ear for about 10 minutes at a time, then retaking the test and noting the difference. It might be heat (doubtful, there is not much heat involved, at least not as much as the candlers wish us to believe). It might be a mental process induced by spending time relaxing and focusing on the ears and the hearing.
Neither I nor anyone else knows the exact mechanics of ear candling because the hucksters are not interested in truth and the researchers are not interested in quacks. I’m just saying that to disavow the entire practice based on bias against the presentation is a fallacy that could lead to travasty if some quick, cheap, effective and non-pharmacological treatments exist but are disregarded. This is the basis of general bias against alternative medicine and, in my opinion, is detrimental to progression of medical treatment itself.