With this group, I assume most of us fall into two categories:
1. Already have Volo's and Mord's, so the gift set is a waste.
2. Already decided not buy Volo's or Mord's because it's not the kind of content we want, so the gift set is a waste.
It's actually interesting how many would/will buy the book separately. For me I didn't want Volo's r Mord's because I don't want to buy lore (I can do that myself) but this book has a lot of player options which is useful to me as a player and dm. But only to a point - I picked up Tasha's only this month and so haven't used any of that, and my dm's are really open to homebrew and UA races so I don't need to buy anything to access more races.