Imagine regular adult workers were given "homework" they had to do every day after work at home: This would be considered as a severe worker's rights violation and fought tooth and nail.
Why do students not have "worker's" rights? Are they less of human beings?
IMHO once you walk out of school your "work" duties should be over, just like they are for adults.
So what's stopping schools from introducing clear separation between the work and private life of their students?
If the homework tasks are so important, why not have the students do those at school with supervision?
Then there wouldn't be any "students are using ChatGPT" problem to begin with, the supervision could just take away their smartphones, done.