Excellent trousers, terrible idea.
I write as a woman who just came off a bus in pyjamas, so my boundaries are as elastic as my waistband. Oof. Lovely.
There comes a point where not making the effort looks rude, and those trousers are spot on it.
Part of being a functioning human is acknowledging others and the greater good, and you’re dressing a bit for that at a wedding, not just for you.
You won’t look like a guest and no one will offer you a drink.