Cut off an arm? 
Seriously, coaches seem to work well for those without good auto-regulation. Like people that burn themselves out and don’t know how to step back and take a rest every now and then.
I kind of wish I had got a good coach 7 or 8 years ago when I started riding more seriously again and doing group rides in a big bike club. I think it would have fast tracked my knowledge quicker. Instead, I spent the last 8 years making training science my hobby. I feel like I finally have a good understanding of training and can train myself but it took a while.
I don’t think you will get weekly meetings and coach that teaches and explains everything for 2000 per year. That seems to be more like a $500-600/month type of service from what I’ve seen posted.