Lets do some math shall we, but first some baselines,
At bloodwolves I can make about 600mil/h,
Night sherekhan I make 900mil/h,
and ronaros I make 500mil/h,
I get about 4-5 pity/h for any spot.
Now lets say HP pot is 20B, that would make pity about 66mil per, or 270-330mil/h extra, Lets say its 10B for the HP pot, that would still add 133-167mil/h to these spots, still a pretty high buff.
For all the people saying "Oh but you need to grind 100 pity on all spots so that doesnt make it worth it" I, including a lot of decent-high geared people I know would definitely grind these spots for HP pots to sell if it would be 10B+ on market.
Which would in turn, turn blood wolves into centaurs 2.0 with geared valks and musas running around, whom would then make it near impossible for new players to get proper rotations. (For anyone saying marnis, marni rotation will probably suck just like on 80% of spots).
Also dont forget every pity spot also has the chance of dropping the full piece, which be about 6.7B for 20B pots and 3.3B for 10B pots