I was shown this edit to review.
It's a nice edit, sure. But it also adds a ton of stuff the OP don't put in.
Should I approve or reject such edits?
IMO that wasn't an attempt to reply. It was legitimate attempt to add to the answer (each paragraph was about a problem with unencrypted traffic). However, I'd have agreed with the rejection, but only because it added too much. It should have been in an answer of its own.