Most of humanity don’t have one and they’re just fine.
Just because someone has doesn’t mean you need one.
Or because the winner has one, doesn’t mean you are playing the same game.
It’s expensive because it’s an unscalable, generous human to human act.
The cost benefit analysis don’t work out, making it a bad investment.
It’s a pain finding a good one.
An article, a book or a friend would probably be faster and cheaper.
Perhaps until you run out of options, you don’t need a coach.