> ...build relationships with their students & having open dialogue...
You're right. And that DOES WORK.It's why the most elite schools in the world use classroom setups like "Harkness Method" (https://www.exeter.edu/exeter-difference/how-youll-learn).
The problem is that it's expensive, class sizes are a fraction of what public schools have to serve. Instruction is "mastery-based" which means that individual students don't move forward in the curriculum until they've demonstrated mastery of prerequisite foundational topics.
This is part of the reason why kids from wealthy families can end up in elite colleges. Connections help, of course, but the kids are well-taught. For them, learning disabilities are just obstacles that can be worked around, fall-behind one semester because of teenage stuff? No problem, they get tutored out of that rut. The same kinds of problems in an overcrowded and overwhelmed public school end with the student being stuck academically and not prepared for college.