Hybrid classes worthless in classic endgame?

Hello!
Back in the days i played a Hunter in vanilla, hit 60 after trying every class to around 40-50 just before TBC was released.
I switched to Enhancement Shaman and Moonkin Druid in TBC and played them until i quit Retail WoW some months ago.
I was pretty hyped about a new, big and true blizzlike vanilla server, as i liked vanilla leveling and gameplay alot - but after some research and reading some threads in the forums (including this forum) it sounds that hybrid classes kinda worthless if they dont specc heal - at least in PvE.
Is it really that bad - or is there space for hybrid classes that are non-heal specced in the raids / PvE groups?
Back in the days i played a Hunter in vanilla, hit 60 after trying every class to around 40-50 just before TBC was released.
I switched to Enhancement Shaman and Moonkin Druid in TBC and played them until i quit Retail WoW some months ago.
I was pretty hyped about a new, big and true blizzlike vanilla server, as i liked vanilla leveling and gameplay alot - but after some research and reading some threads in the forums (including this forum) it sounds that hybrid classes kinda worthless if they dont specc heal - at least in PvE.
Is it really that bad - or is there space for hybrid classes that are non-heal specced in the raids / PvE groups?