And by "twice the work" they mean takes twice as long. It's still time.
Anyway you could just say "2 days of work" with the understanding that duh, a senior can do it quicker than a junior. It's just an estimate anyway.
It's weird how people whose half of work is coming up with clever abstractions, have so much problem with that one.
That's why points aren't really necessary. Using days is still an estimate.
That said, I don't really object to points, I object to the idea that they don't represent time, when they obviously do.
Maybe estimation is complex thing and therefore team needs to align opinions before doing it?