I really think the question is why wouldn't you block those ads using something like ublock origin or adguard (admittly you will lose using the app which is better for some people) but you solve your greatest point of pain.
I think the original question is valid here - I also don’t get any right-wing ads. I guess that is because I never interact with those kind of post, also not negatively, exactly BECAUSE I want to see less of them.
Twitter still allows you to mute/block any advertiser… I’ve seen fewer big companies that make a million throwaway accounts for advertising to make it hard to mute. Any ad account I notice more than a couple times gets muted, Twitter asks me if I want to upgrade to paid and I ignore that.