Responses
It's because smart MC are almost non existent. Sometimes some author give us the illusion of a smart MC, but it's often fake. It's easy to make someone seem smart when the world revolve around them.
Like if a MC have medical knowledge then how about making a world that doesn't have any good medical knowledge?
Or if the MC is a good cook, how about making a world that only somehow know how to cook crap to eat?
Honestly, while i do enjoy reading isekai story, one thing i really miss is having MC feel like they are part of the world, instead of feeling like the world revolve around them, which is often the case with isekai story.
Why did you do tha- well whatever what better can I expect from these isekai FLs. We rarely get to see smart FLs who actually take good decisions and aren't oblivious af. So I'll just lower my expectations.