I like to know how to repair things that I use. Phone, PC, washing machine... Same is for car. If we let big tech/companies sorround us by things that we don't

I like to know how to repair things that I use. Phone, PC, washing machine... Same is for car. If we let big tech/companies sorround us by things that we don't know how actually works or how to fix them, then we are screwed and completely dependent on their rules and trends. For example imagine that car will be manufactured without opening windows, like modern trains. Or they have implemented CO2 meters that collect data and limit traveling based on regulations made by gonverments.