Have you seen this: https://trog.qgl.org/20081217/the-why-your-anti-spam-idea-wo... ? You're proposing a legislative change, and bots in the US, Russia, China, whatever can care less about the acts of the EU parliament.

I also don't see how EU solves issues with CAPTCHAs. Anonymous CAPTCHAs are allowed in the EU.

Once regulations against disruptive bot traffic are effective enough that you don't need captchas, please ban captchas. But I don't see why you would do it the other way around. (Unless you secretly know that effective regulations against bot traffic are impossible.)