are we not still left with issue of who counts as a scholar at all? how do we define the ulema?
Are scholars people who can trace an unbroken line of studying under other scholars, eventually going back to muhammed?
I think we are left with such a case. Any issue is modern scholarship is based on previous scholarship and so on. At some point this chain creates a contradiction between modern views and that of the past. Take slavery as a prime example. Modern scholars will argue that slavery was to be abolished, is immoral, etc. Contemporaries will agree to a point before one starts find a change of views in the chain of scholars. A new chain is made with opposite views which is closer to the source of these views. Hence why people will ignore certain adhaith thus creating a self-refuting view. If previous scholarship is not reliable than one can not use a chain of scholars as a source of authority. Further more this places Islamic tradition in the realm of being questionable since it relies on said chain for reliability which is now broken. This issue is not one of academy but of dogma, doctrine and tradition. One can accept tradition is not reliable as claimed which causes one to question basic tradition regarding the reliability of the Quran and post scholarship. An reevaluation of such a massive collection of scholarship is hindered by religious views. So cherry picking view becomes the method used rather than question basic beliefs which give Islam it's foundation.
Another view is geocentric versus heliocentric models. Modern scholars will makes claims that the Quran supports the later. While older scholarship shows no support when geocentric views were dominate. Again ad hoc rationalization comes to the rescue by rejecting views or reinterpretation of geocentric models in favor of the heliocentric model.