Not to make it all about personalities, but "this HTTP client person" in this case is the lead dev behind probably the most heavily used HTTP client library of all time. (Not even sure where I would begin to find those kinds of statistics, but I'd be shocked if something else came anywhere close to cURL's usage.)
I mention this not because his opinion is infallible but because he's seen some weird edge cases and weird use cases over the last quarter-century or so.