It seems to have gotten a lot worse lately, and the recruiters all seem to copy each other now:

Recruiter: You seem to be a perfect candidate for job A.

Really? That's nice. I'll read on to see the offer...

Recruiter: The position is a senior role using X, Y, Z

Wait a minute, I don't use X, I've only seen Y once and haven't worked in Z for years. What makes this person think I'm right for this position?

Recruiter: Can you send me your resume.

Oh, I see. CV scraping. They collect them for their portfolio I guess, or sell them on or something. It really isn't worth replying if they couldn't even be bothered to read the Linkedin profile they sent a message to, from which it would have been clear that I am in no way a perfect or appropriate candidate for said position.