I think like all professions the professional, dedication and attitude varies greatly amongst staff. Whilst there are many dedicated professionals there is a significant number who are not. During the pandemic some have gone above an beyond other teachers have used it as an excuse to do as little as possible
You're right that there's good and bad in all professions, but I also think you've got to be mindful that your average teacher doesn't get a say in what the whole school policy is.
For what it's worth, I think my school got it right with paper work packs and online materials through the first lockdown, before phasing in limited live lesson timetable in the second lockdown. Our timetable factored in that the vast majority of our families have several children and not enough devices for live lessons all day. Plus, our parents (like many on here) quite reasonably said that they haven't got enough hours a day to supervise and monitor live lessons all day for several children,so having a flexible programme worked for us. (I'm under no illusions that some Mumsnetters think anything other than 8.30-4pm live lessons is horrendous though)
But if I worked in a school that had a different approach,I wouldn't have a choice to do as much or little as directed by the head.
In the first lockdown the curriculum was suspended and there was no guidance or direction from DfE and there was no set expectation. Don't get me wrong, some schools did nowhere near enough. I just think it's unfair for people to argue that poor education provision in lockdown comes from some teachers who can't be bothered and want to do as little as possible.