Additionally, ReCAPTCHA is worse than a metal detector, since in addition to being an inconvenience, it's performing unpaid labor for Google. It's more like a bouncer at the door, who won't let you in unless you grease his palm first. Just filthy corruption, plain and simple.
How is it corruption? The website’s owners consciously choose to use said bouncer who has agreed to accept compensation in the form of making the website’s visitors solve captcha.
Do you think that's universally true, like website _owners_ (as opposed to developers) realise captchas are a thing? Seems unlikely to me; the dev setup a cdn, the owner mightn't even know what that is.