Doctors used to recommend tonsillectomies...
They certainly used to be very common when I was growing up (1960s-70s), and no doubt were over prescribed. But it is also true that they still have their place.
A relative of mine had persistent nasty tonsil infections for years, and went through hell with them, and endless antibiotics. Eventually they were removed and the tonsil problem disappeared permanently, and his overall physical health quickly improved a lot.