Probably a lot because now a lot of programmers up to maybe the top 10% or 20% are worried they're not good enough which will lead to a lot of stress and in turn, less productivity.
Aside from that, if all of programming is competitive it will keep a lot potentially very capable people from entering the field because not everyone (regardless of ability) is made for competition.
Aside from that, if all of programming is competitive it will keep a lot potentially very capable people from entering the field because not everyone (regardless of ability) is made for competition.