It is also extremely cost prohibitive to have wild pure bloods. I have a pair of wild leopoldi, (yes leopoldi and I will call them for what they are), and for those now days to bring in, you need an importer who has an allotment from the country they are being exported from, and the knowledge to collect them safely. Now a days wild leopoldi are well over 1000 each, money upfront before they will even go look for them.I'm pretty much stuck in the middle on this topic... Pure blood are definitely needed.
But I tend to like hybrids as well. Simply because some of them are absolutely gorgeous and their patterns are one of a kind.
In a perfect world I would love to have enough space to keep several different pureblood species and also a tankful of hybrids.
As far as the aquarium hobby goes for stingrays in particular... I believe there will always be hobbyists wanting to keep stingrays. There's a new generation of people born every year.
I think the key is making sure experienced hobbyists are willing to help and give them the direction they need.
... And my negative thoughts toward hybrids mostly comes from Asia. With the exception of the high-end breeders I would say there are a lot of breeders overseas who create hybrids calling them pure blood and definitely messing up the gene pool.
With imported wild caught stingrays slowly declining there is a strong possibility the pure bloods will eventually disappear from The hobby.
But I wouldn't give up my pair for very much because I don't think I could realistically ever replace them.
I remember the work it took to get mine when I did and it's not a process I want to do again soon