i don’t spend.
i still don’t have enough gold… neither do a lot of the people who don’t have the mount (which is why they don’t have the mount)
some people have more time to play than others.
some people play on servers which have terrible economies.
some people buy gold with real world money.
…so no, the same opportunities aren’t there for everyone.
but feel free to go and tell that to all the people here:
https://us.forums.blizzard.com/en/wow/t/looks-like-the-mighty-caravan-brutosaur-might-be-unobtainable-in-901/
i’m sure they’d love to hear your righteous opinion on the matter.