I had a think about this myself the other day.
The poppy is meant to remind us of the horrors of war, the sacrifices made by those who fought so the rest of us might live in freedom. Raise a bit of cash for charity. But it doesn't seem to want to achieve any future goals beyond perhaps less war. Most importantly it's not pushed down people's throats against their will.
As it stands now I don't care if a person buys or displays a poppy or not. It's their choice, and I don't know if I can even be so pompous to say I respect that choice, because I don't even notice it. It's very much a take it or leave it thing. It's very rare to heard even mild controversy over poppies.
However if the police started painting their cars with poppies, the NHS started covering lanyards and everything in poppies, the police started treating people differently depending on if they were wearing a poppy or not, people who didn't wear poppies started being deplatformed and losing their jobs, banks started cancelling the accounts of customers who didn't buy a poppy, etc.... I think very soon I'd start to dislike the authoritarian nature of the poppy brigade very very much, despise them in fact.
Part of my vitriol is not the cause itself, but the way adherants of that cause have conducted zirselves ( OMG when did the twitters unblock Godfrey Elfwick?!?! pbuh ) since inception. Entitled brats demanding the world conforms to them.
I think there's a tiny bit of wiggle room around impartiality and rules. Sikhs being allowed to carry a kirpan for instance I think is a great compromise that shows a just and open society. Unfortunately where we stand now on police impartiality is long past a tiny bit of wiggle room and far into multi coloured clown world. Those police cars look ever more stupid like Noddy's car in a child's picture book.