This debate is almost impossible to have on a sensible way. Complex issues are not black and white. Exclusions and discipline are a symptom of the problem, not the cause.
Students with SEN need resource, compassion, and early intervention. They need specialist provision. The majority of students need calm, orderly classrooms to learn.
Behaviour is schools can be horrible, and to be fair on the kids, how and why do we expect them to prefer a balanced (and sometimes boring) curriculum over Tik Tok. Teachers need to be able to enforce behaviour expectations so students can learn. And don’t tell me to make it interesting - kids should be exposed to a balanced curriculum even if they find some parts boring (few will love Shakespeare, geology, and differential equations - but many will love one if exposed).
Teachers need leaders who enforce behaviour expectations so they can teach the curriculum. Students in poverty safe classrooms this as much as students from more affluent families.
We need both. We need orderly classrooms AND support for students who don’t thrive in those environments. This is obvious.
It needs money. The nurture/discipline dichotomy is false.