What is form? Whenever we set up a shot in a standardized sequence we are employing "form". Now, this may be a very good or a very poor form. Every archer can set up a shot any way he/she pleases, but it is widely viewed that certain steps tend to constitute "good form". When I say "good form", I mean following shot set up that helps to produce consistently good performance. Most of the best shots I have seen tend to follow similar form. Reaching anchor, smooth release, employing back tension, forming a proper "T", etc. are not overthinking anything in my opinion. Others refer to muscle memory when discussing form, which is simply doing the same thing the same way until it becomes an automatic event. A good thing in my opinion. We learn form in a very stylized manner but learn to adapt when a hunting situation prevents the use of "perfect" form. Eventually, we develop a shot process that works for us. Granted, it may not work for the next guy. Developing good form is not overthinking!
Perhaps we do overthink a lot of things in gear selection and other aspects of the archery/bowhunting game. As silly as we may think some of the picky things people do, we need to remember that they can do things the way they choose. Just let their comment pass as what they actually are - their opinion. We don't have to agree with them to accept them as fellow sportsmen and friends.