No.. you can improve technically without looking anyone else's work, but being a good technician is different from being a good photographer. Some of the best images ever taken are technically imperfect. Sometimes it's the treatment, subject, story, narrative and thought behind a shot that makes it great, and that usually does come from being inspired by others.
I find a great many photographers, predominantly amateurs, refuse to admit they are influenced by others because they see it as a weakness, but in reality, the opposite is true if you ask me.
I'm heavily influenced by cinema and painting in my own work, and and am probably heavily influenced by David LaCappelle, Tim Walker and Ruven Afanador in my studio work. That doesn't mean my work looks like any of theirs.. I take a bit from here, bit from there.. mix it all up and create something else. That's how creative people work. I think exposing yourself to as much top end work as you can is a great thing to do, otherwise you slave for ages over something in ignorance only to realise one day that you're massively out of tune with what industry wants. The industry wants new, fresh and innovative work, but how can you be sure you are being fresh and innovative if you pay no attention to what's going on?
I am of course talking generally here.. I've no real idea what you do or don't know, but by your admission you pay no attention to others' work.