Lawmaking is fundamentally different from exercising executive power like signing bills into law. Also, despite what some Republicans might argue, lawmakers are subject to the law. Nobody is above the law.The idea behind term limits (among other things beyond the scope of this conversation) is to require lawmakers to live under the same laws they impose. It is a beautiful concept, I wish I could get you on board.
Secondly, the idea that "lawmaking" is some esoteric line of work, that the population could just not handle is just a lie. It's a lie the populace has bought for well over a thousand years, and the lie has kept a history of kings, dictators, parliaments in power to the detriment of that very populace.
Your mistake here is that you have really granted to much credit to any congress, as if it is made up with a series of ultra-intelligent individuals who are philosophers and hard-working at heart. The best and the brightest among us.
In reality, we have a series of individuals that spend 90% of their 'job' self-promoting, accruing bloated administrations, mastering hand-shakes with the lobbyists, expensive dinners for fundraising events, all while most of them struggle to empathize with the very public they are supposed to represent. It's a shame you endow these people with so much credit and admiration! It's a shame you believe that you or I or anyone could not comprehend how to say 'yay or nay' as it relates to a law and how it will impact our lives! It's a shame!
We must treat government as a public service not a career!