I'm responding to the 4K is better thing because it isn't. If you can simply run the same game with the same setting on 1440 vs 4K without any performance penalty then obviously the game is not using the hardware properly on 1440. It is always a trade off and for me personally, I prefer lower res (1080p) with better quality vs 4K.
If there is going to be no performance penalty with going from 1440p to 4K the only scenario that I can think off will involve 2 different hardware, like a game developed for Xbox series where a dev could target 1080 or 1440 on S and 4K on X and be done with it. Even then, in that situation, I do think one of the console will not have its hardware utilized in an effective manner.
Having said that, so far it seems devs prefer to sacrifice S as in develop for X and see how low the setting need to be for S, which is a good thing.