Look, you can shit talk a good player if you want. You can be the guy who cheered the loss of Gill, Barnes, Fardy, etc. They don't just go away and magically become better by drinking special NH juice. They were always capable of the magic they produce, and a lot of player development is the mental game that comes as palyers age.
Some have it so well developed in the early 20s that you know they'll be special, and some manage to connect that with physical and technical ability at a similar age. Nic White is one of those players. He didn't breathe the free air of France and Cornwall and go "by golly, I guess I don't have to be shit!". From 2012 onwards, he was a Super level scrumhalf. From 2014 onwards, he was a test level scrumhalf. As it stands, the only SH scrumhalf I would pick over him is Brad Weber, and even that depends on Weber not suffering yet another injury.