It's hard to make generalizations because each district is a unique situation. In my local school district, I know for a fact that the teachers tried very hard to make distance learning work as well as possible. They also learned a lot that they can apply to future distance learning situations - even if it's just a "virtual" school day due to winter storms.
Granted, with distance learning, kids need to be more self-motivated and that can vary from kid to kid.
But - bottom line - show me a kid with good grades, and in most cases, that kid has parents who support education and provide a quality home environment. show me a kid with bad grades, and odds are the parents don't give a bleep about education or the home life is a bleep show.
BTW - my prediction is that MN will go to the "Hybrid" approach, so kids will wind up spending half the year in class and half doing distance learning.