He is better than Nurse though.
The ONLy reason he has had the TOI he has had over the years is because the team didnt have a legit top pariing like ti does now.
Is anyone arguing the opposite? It would be crazy to suggest otherwise.
Take the same logic that you are using (Bouchard is a better player than Nurse and .: should be paid more than Nurse) and flip it to see how ridiculous an argument this is. For example, you could argue that Jake Guentzel isn't as good as Zach Hyman. Hyman signed for 5.5M (a bargain deal) so Guentzel should come in under what Hyman signed for. This is obviously a ridiculous statement. The truth is Hyman was paid to be maybe a 30-30 scorer in the league not a 50+ goal 80+ point player. He is outproducing his contract the same way that Darnell Nurse is underperforming on his.
You have to look at what the market dictates and how the player performed at the time of the contract. Nurse signed his contract with the expectation that he would continue to play 24+ a minutes, shutdown other teams top guys, play in all scenarios and be a true #1 dman. The fact that hes a second pairing guy doesn't mean that guys on the first pairing should get more money.
Don't get me wrong, Bouchard is playing the best hockey of his life right now and earning himself a massive contract but comparing what he gets to Nurse just doesn't make any sense.