I found quite early in my PPL career that going to instructors was a waste of time, because within a few hours of post PPL flying I'd been to more places and experienced more different environments than they had!
I think this really depends where you elect to do your training, and which instructors you choose. I have found that if you are in the "school" environment (rather than club); A large number of instructors are 200ish hours, CPL/ME/IR/FIs with brand new licences, who are just building hours before being let loose with a big flying bus - then yes, you may very well have that problem, especially if they had just done all their exams at that very school, as this would limit their experiences. But there are many instructors out there whose careers are instructing, and have thousands of hours, experienced all around the world.
It really depends on who you chose to instruct you!