Because that is their pattern. You know what you are getting. That is why people buy a Nintendo and another system. Nintendo is backwards thinking, very reluctant to launch their huge old catalog etc. But they make good games, they still have to deliver because they cannot afford another Wii U disaster. You still do not get my point?Nintendo has a pattern with Zelda of delaying consistently only to then bringing out as launch game for their new system in the end Doesn't stop Nintendo fans from buying their consoles.
I'll have a bet with you right now the new Zelda will launch on the Switch 2 along with Prime 4