I'm not good. I don't do every extreme primal, only the ones where I think the mechanics look fun. And I usually only do the first and maybe second fight of a savage tier. And in those I'm not doing as much DPS as I could and I'm not healing as efficiently as I could, because I can't memorize every timeline perfectly and make mistakes at mechanics. But I'm trying my best every time.
If you are not new and still do not understand that the tank is at like 80% HP or higher most of the time if you just apply a Regen and use some heals here and there, then you should really try to focus on understanding the game you play first. You do play with other real people. Try to put in a little bit of effort at least.
NO ONE in their right mind would say that you have to DPS all the time as a healer and aren't allowed to use GCD heals. It is totally ok to heal. What's disrescpectful is not doing anything but pressing that one heal button IN THIS GAME.
Something I've noticed veeery often during the years I've been playing this game is also that heal-only healers have the most trouble healing people in chaotic situations. They are used to healing being such an easy task because it's usually enough to press those three heal buttons.
So if it gets chaotic and you know all your abilities and oGCDs aren't enough anymore or on CD you just use the GCD heals that are best for the situation to save the party instead of pressing Stone.
But A LOT of bad heal-only healers would just, for example, cast Medica II twice even though the regen timer is at 20s. And never use Largesse and so on, because just Medica II was enough when nothing bad happened. Because they are not used at all to using all tools available to them. They never tried healing efficiently before. But if you like to put out as much DPS as possible, you HAVE to heal efficiently. That makes you learn how to use your heals much better as well.