You are being over the top and quite frankly ridiculous. I've been using .Net Core in production since its initial release while working for a famous games comp

You are being over the top and quite frankly ridiculous. I've been using .Net Core in production since its initial release while working for a famous games company (which you probably heard of) and now for a multi billion dollar FinTech firm, and the whole time I have been using HttpClient or libraries using HttpClient for connecting to services/apis. If your whole reason for not using .Net Core is based around this weird and honestly unimportant edge case, all that tells me is that you have a strange bias against the framework for some other reason and looking to nitpick.