[anamax]

Yes, there are many problems/things one "should" know, but how many of them are essential for an MVP? More to the point, the fact that there are some "essential for MVP" things that you can't do doesn't mean that you shouldn't work on the "essential for MVP" stuff that you can do.

And then there's the "not product development" stuff.

There is always something that one can do to move forward.