I think two bloodline main events is overkill. Tag title match can kick off the show. Crowd will be hot and will force everyone else to step up their game.
In terms of deserve, I don't know, but Rhea Ripley is getting a hell of alot of screen time on both RAW and Smackdown. It's a star making moment for her at WM so I think it would be better going on last than the tag title match which really has no business going on last.
Not that anyone of this really matters. Did Austin vs Bret go on last? No. Did HBK vs Taker at WM 25 go on last? No. Sometimes people including the talent take the whole main event thing a little to far. You can have a legendary moment where ever you are on the card.