You know those car guys who will rebuild their engine, just because? Or those retro computer guys that will recap an ancient board rather than buying a modern pc?

For you it is a job, for me it is a hobby. I have no interest in making something 'professional' I want to take it apart to understand how it works. Want to understand how a text editor works? Write one.

What component of that is ego?

It seems to me you're the elitist, you're not far off saying mere users shouldn't be allowed to modify their own software, shouldn't be allowed to install software that hasn't been okayed by the people who know what they're doing.