I have cut my own hair regularly for at least 15 years. I did have one hairdresser trim just before my 70th birthday celebration 3 years ago, and having paid out around £15 for less than 5 mins work, continued to feel that it was a waste of money.
My hair is straight and shoulder length, and now quite thin, so it's not a difficult job, and I use proper hair cutting scissors. I find the fringe the most difficult part and sometimes need a couple of goes at it.
I never liked going to the hairdresser's much anyway, and only ever had a trim. Why pay for a wash and blow dry when I can wash and dry my own hair, thanks. I don't colour my hair now either, and have been lucky to hold on to quite a bit of natural light brown colour in it still despite being 72, though it's greying more now, but in good condition. I take collagen supplements which seem to have helped its condition.