Nosewheel should never be anywhere near to being the first thing to hit the runway. In a Piper, for example, this would be an easy mistake to make but if you're landing a Gulfstream with the nose that low-down, you're in serious trouble.
why is that bad?
You porpoise the landing. The front gear in just about every aircraft is not intended to take the weight that the rear can. End up in an unstable oscillation, until it gives.