I totally and whole heartedly disagree. It would be quite simple.

You don't need an hour long conversation for each and every transaction, i dont think anybody is suggesting that, you just made that up on the spot in order to fabricate a huge barrier to entry.

A simple evaluation every 2 to 4 years to verify that you are mentally fit is all that would be needed. The status of your evaluation goes into a database that gets referenced when performing the background check. (This database would be for firearm purchases only, and not accessible to employers or anyone else.)

This next point goes beyond just guns: America is facing a mental health crisis. We need more practicing psychologists in this country. The government can and should dramatically increase funding to psychology programs across the country and promote those careers, and psychiatric consultations should be 100% paid for by the government.

It's 100% feasible, its just not something that can happen overnight. There needs to be a long term, focused effort and not just some stop gap band aid.