The sentiment that “baal batim” should learn something simple is somewhat outdated, at least does not apply to everyone. We discussed this in threads on ladies learning Gemora. Kal vehomer, this applies to men.
Some of the “BB” in our days are lawyers, doctors, engineers, politicians … They (a) have access to sophisticated information about other aspects of life (b) need to know how to answer numerous apikoiresim they encounter (c) are capable of learning complex things. It is probably obvious that they should not start with Daf of course, but rather first learn how to learn slower and in depth.
Another aspect – Gemora is a tool to be applied to current environment. Given how different current social and business environment is from the one in Gemora, learned BBim are the ones who can help apply Gemora method to current times, including being advisors to poskim or local Rabbis on issues that require expertise in medicine/science/business/psychology. For example, myu local hareidy rabanut reached out to a local charedi epidemiologist when covid started and his zooms were a hit with the charedi public as they could relate to him. Similarly, R Soloveichik justifies (b’dieved, in his words) opening YU Medical school, saying that we need doctors who are at least exposed to Yiddishkeit and can better relate to observant patients.