> I see people using Ubuntu, I always wondered why? It is so interesting how people in tech just fall into the fashion trap.

I would rather attribute it to advertising, and probably some contracts with the right people. Canonical did a lot of advertising in the past years, and contracts can mean a school mandates the installation of Ubuntu, which translates in hundreds of students becoming accustomed to it, together with some of their parents and friends, and so on. This is something completely out of the reach for a community supported distribution like Debian; attempting to change it would mean putting a corporation behind it, which would be a recipe for destruction of its principles.