There are also a million ways to achieve the same goals without agreeing to be Amazon's snitch for your entire building. Amazon isn't stealing the data. The ring camera owner sold everyone out.
Also, just so we're clear, the maintenance worker still had access to her apartment and could have just lied about the reasons. It would not have stopped him in any meaningful way.
"But she would have known who it was!" .. yeah, AFTER he was inside her apartment. It doesn't even do the one thing you're claiming it would be useful for.