Are you actually referencing a mastodon post made by one individual claiming to be a lifelong teacher as substantiated evidence to support your claim?

I’m also a lifelong teacher, and I think homework has its place.

1. It allows teachers to assess a students progress and identify issues that individual might be struggling with.
2. Teacher can modify the curriculum to improve common shortcoming appearing in homework results, in other words, hw can help the teacher help the students.
3. HW allows more accurate grading, so you’re not just judged based on your tests, your attitude in class, and the teacher’s gut.
4. As I mentioned, it’s practice for the student. Sure I could do math accurately if I really thought about it, but getting lots of practice in means it takes less time and I don’t look foolish at some point when it matters.

That said, I almost never assign hw in my own classes unless students need more time with a project than I am able to provide. That said, some student are never happy when I give them a score based solely on how much (or how little) they actually participate in class vs poke about on their phones.