On the plus side every instructor I flew with was 30+ (most were probably 40+) and had hundreds (more likely thousands) of hours experience
You make a very good point, but folk do have to start somewhere. Did an instrument trip in a 172 with one instructor, Peter Raven, all of 21 years old at the time, only trip I ever did with him. One day a pax forwarded an exercise book to the cockpit with a request to fill out the details, was a quasi log book, flipping through it came to Peters name, command in a QF 744, a lot grander machine and position than the one I was punting.