No offence taken.
My desision comes from two factors that play together.
First I am relatively poor and if I save to painfully save money and give up on other things that are also important so I can buy a GPU I want to make sure that I pay as least as possible for the most performance, if it takes a day to render a small animation on an nvidia GPU, it will take two days to do the same on AMD at the same price point. Besides I want to try to do this professionally one day, if that is to happen I can't let my clients wait double, they will hire someone else.
Also I use Linux, so trust me I would love to get an AMD instead and get proper drivers.
The other factor is that I don't believe my purchases as single individual make any dent in the market whatsoever. I can't get it in my mind, I'm just one person, there are billions out there with way more money than me. The children get killed in Palestine and the data centres boil the earth no matter if I personality buy nvidia or buy from amazon or not. It's kinda of a paradox because if everyone thinks like me then collective action doesn't happen.
It's kinda similar how I would be vegan if I had to kill the animals myself, but I don't believe that if I stop buying chicken that less chickens get raised and killed, the retailer orders 1000 chickens independently if I buy one or not.
Edit: I know I sound like a terrible person, but I try to make conscious choices when the price is similar and most people just laugh when I mention it and say something in the mids of "lol who cares".