To play devil's advocate; it is better to have some kind of fallback when the automated, non-interactive verification does fail.

Anecdotally from many posters here and as I've personally experienced, automated verification (as attempted by some captchas which entirely eliminate any user interaction) is not foolproof, and an escape hatch is necessary from time to time.

While it could be argued that this leaves the captcha vulnerable to automated solving, the fact that there is a small cost to acquiring a GPU server, a captcha solving service, or a image segmentation model does act as a deterrent (even if small).