It's full of fallacies, at this point it's become a circular argument where they just repeat their points over and over until they "win". This was never even an argument, I was not trying to convince anyone to do anything from the start.

I'll break it down though so you can recognise the bad faith arguments in future.

Assuming the Wikipedia article is correct.

Attacking the source of information unjustly, when they themselves have provided zero hard evidence in this entire thread.

That is not proof that MY money goes there. She would have payed it without me buying the game anyway.

Ignoring the fact that more money means more funding. As if she magically conjures her own money.

I don't care about her political stance and acts. It's also a topic that does not affect me, so I do not have any feelings.

Earlier they said they do care about trans rights, now they don't.

Every company does something bad, should we never buy games again, because a producer did something stupid or the parent company getting money does something stupid?

Whataboutism. We're not talking about other producers or other games, just this one.

She is not involved in the games I buy and play, then I buy and play those games.

She is involved though, so this is just wrong.

I don't care about her opinion. I don't know how to make that more clear.

Getting defensive and standoffish.

and Warner Bros would hardly notice your support.

Ah yes, selective facts. Why does Warner Bros doesn't notice my support, but the one person you are against it does?

False equivalences. Warner Bros is a multibillion massive corporation and has an entire enterprise of many brands. Rowling basically only has Harry Potter. Much easier to boycott one over the other, and Warner Bros as far as I know isn't funding anti-trans stuff. They're also implying that funding Warner Bros is some kind of noble act like giving to charity that counteracts any harm Rowling does.

In fact, royalties are just a little sum, compared to the entire costs.

Downplaying their contribution, and ignoring half the facts I've provided earlier in the thread.

It's generally not worth talking to people once they get like this. They've already made their choice and are only trying to justify it in any way they can, using emotional arguments rather than logical ones.