No, no it doesn't, that's precisely the point.
The SMF one has been broken by bots for years. ReCaptcha has also been broken for at least a year. It's incredibly easy to automate - I've even seen JavaScript implementations for OCRing the text in a CAPTCHA and even limited neural network solutions (i.e. a JavaScript routine that's able to learn and improve its ability to process text)
Please understand, we know what CAPTCHAs can and can't do, we've been fighting spam with them for years, and we've learned their limitations only too well - which is why almost two years ago I implemented my own from scratch, which Wedge inherited.
CAPTCHAs are outdated and do not actively solve the spam problem.
Limiting the website link to 10+ posts doesn't really solve the problem either, the bots won't notice and will try it anyway, the human spammers might be discouraged. We have also made that entirely possible in Wedge, to limit website and signature to higher post counts, plus it's also possible to set things up where a user can put their signature in but it isn't visible until they made 10 posts (or whatever setting you want)