Despite the fact that the idea hasn't been thoroughly considered, it doesn't seem that far-fetched. It will give alts some playing time. It won't affect anyone's experience, since the blue team should have experienced players.
We do not know whether having the blue team available to players who have spent playtime is helpful or terrible, so being negative about it isn't a smart idea.
Frequently, people have overridden the mic verification but failed to get a mic. The same thing can happen when a throwaway account joins to create chaos.
The truth is that if we make them spend more time playing before the MFK even begins, we are most likely making them waste more time than if they select the blue team right away.
This will only cause a slight hindrance in the game, but it will discourage people from trying to cause chaos with alts. As a result, it will not fix the underlying problem, but might make them sacrifice more time.
Since many of the popular jailbreaks for CSGO and Garry's Mod have blue team locked behind playtime and trust, it's neither a shitpost nor should you ignore it.