Utter ball sacks, they’re marketed merchandise to be purchased and worn. I have a England football shirt tucked away from when I used to play (not for England obviously) and it has a gold star on it for winning the world cup; something I haven’t done but my country have.
If you chose to wear a trade team or a champions jersey, what’s the real issue?
Can you honestly say you have no branded clothing with visible labels that promote the brand or anything else?
What we have here is a difference of opinion. The issue for me is a lack of respect – I haven’t (and wouldn’t) say it carries over into other sports, I couldn’t care less if you wear an England football/rugby/synchronised swimming replica top, but cycling for me traditionally respects the champion jerseys and you don’t wear it if you haven’t won it. I’m not going to stop you from wearing one if you really want to, but I am going to make a judgement about you.
To reiterate exactly what I said in the post you quoted, trade teams are a different matter, I choose not to wear mine when riding because I think I’d look a tit riding that slow in pro kit, if you choose to that’s entirely up to you. In answer to your question I do have branded clothing, although what that’s got to do with anything I said, I don’t know.