GP is referring to the LLM crawler captcha thing. The one with the anime girls in it. It only took a few seconds on my phone, but it's slow on my old ThinkPad.
And the point of "why waste time for captcha for static file" still stands, it's not like there is comment section for bots to abuse
Don't blame this on site operators, this is the fault of careless LLM operators knocking down everybody's walls doors and windows to "learn" from their content.