Because Gigas are the most powerful tame in the game. With all the crap added with the DLCs, its super easy to get 100 imprint gigas. Practially everyone has 90% imprint+ tames. Raising is a joke and takes no effort at all.
My discord DMs are overloading with conquest tribe reform requests. Thank you guys for listening to us, I hope some of my ideas get accepted so we can spice up the meta on classic and conquest.