Yeah, I think the people arguing for this don't understand the full context. You get extra points for taking the equivalent of upskirt photos of women who are being attacked by or in fear of being attacked by zombies. It's textbook exploitation.
I can't immediately think of a context where it would be better, but... it isn't this.
I find it to be a much better experience than wallabag from a UX perspective.
Archiving is great for individual pages. Not sure about highlighting, I haven't tried that.
If you want to bulk archive a site, something like archivebox would be a better fit. (It doesn't sound like that's your goal though.)