Quick question why are they many programmers but only few make cool programs that people love

Answer 1

Besides what Default has mentioned, lots of programs are only used internally by corporates and businesses, and others are small tools that can be very specifically targeted.

Default
Terry Davis (recently deceased) made TempleOS 100% by himself, a true legend. But yeah, usually it's teams that make the most commonly used software

Answer 2

David Dung, because we also need programs that just do a job very well, like steering a machine, manage data or whatever.

For purely practical purposes the love of people for these programs is not necessary.

Or are you talking about SoloLearn specifically?