You can build a 1080p rig that is about as big as a Nintendo Switch.
You can build some fairly impressive SFF PCs, but even an InWin Chopin breaks that volume budget if I've done the math right, and it's not a cheap hobby. They to me feel like a class above this.
But I don't think there's need to argue this further, I think the point that there isn't a one-size-fits-all solution has been made exhaustively, by everyone.