Of course ticket scalping is fine, many venues go out of their way to enable it.
I’ve often benefited from the scalpers by being able to buy last minute tickets. Same goes for domain squatters.
You think squatting is bad? Ok. What if my low-effort personal website was “doctor.com” and someone emailed me an offer of $2M for it, should I be allowed to accept that?
I don’t think there’s a meaningful distinction to be made there.