But how do 'the followers' know what to follow if it's not the imams telling them? Who is 'guiding' the average follower if not the imams?Yes, 'should be'.
But, sadly, unlike the physicists and biologists that you mention, who start off with an 'open' mind and let the research data guide them and lead them towards their conclusions, the religious 'scholars' and imams, by and large, start off with a set of views already ingrained in their minds and the intention of their research is merely designed to support and justify them.
Otherwise how does one even attempt to analyze or explain why the perception of Islam is going downhill so fast, with the religion and it's religious followers becoming synonymous with killings, bombings, corruption, human rights abuses, abuses against women...... even to the extent that muslims are killing muslims 'in the name of Islam' everywhere the muslims form the majority of the population of a country .... when Islam itself preaches against all of those things?
Do you think a suicide bomber would be prepared to blow himself up, leaving his loved ones behind to suffer the consequences, kill innocent victims, often young, innocent, muslim victims, if he was allowed to think for himself and ask the difficult questions 'why?' as opposed to simply accepting being told, by someone else who also claims to be an 'imam' or 'scholar', that 'It's the will of Allah - don't question it'.
So, unless you ask the 'forbidden' questions, how does one know that it's really 'the will of Allah' and not something that is said as a cop-out?
In other words everybody accepts the status quo and is afraid to discuss anything that might cast doubt or raise difficult questions regarding the prevailing viewpoints. ie akin to the fable of the Emperor with no clothes, where everybody was reluctant to tell the Emperor what they saw with their own eyes, either due to fear or in case it was their own eyes that were deceiving them, that is until a child came along and blurted out the truth.
So yes, as you've rightly pointed out, no controversial topics get discussed - it is far easier to cop-out.