To each, their own.
I have a couple HD T-shirts, and my wife bought those for me. I also have John Deere T's, a Studebaker T, and a Polaris dealer T. Guess what brands my mower, pickup, and atvs are...
But I am not part of the "sheeple" crowd, living the HD life style. Far from it... heck I have the most undesirable Harley of them all in my VRSCR.
If you want to wear all the HD jackets, gloves, helmets, bandanas, boots, etc., go for it. It will help keep Harley Davidson in business. You are happy, HD is happy... everybody is happy.