The point is that those 4 went out and added elite players to their roster and the only one Bergevin's added in his time here he let walk to throw money at Alzner while the core aged out of their elite years or were traded.
Seguin was acquired by trade and is better than any Habs center since what, the 80s? 70s even? McPhee added an entire first line in a calendar year and Stone would be the best Habs forward of this millennium. Wilson has kept the Sharks among the class of the league for 15 years, with Couture and then Hertl locking in their C depth as Thornton ages, plus adding Karlsson who would be the Habs' best player since Lafleur. As for Kekalainen, I doubt he even means Duchene and Dzingel. He added a franchise winger and defenseman via trade, and when Panarin and Bobrovsky decided to (likely) move on through no fault of his own he decided to go for it instead of perpetually building for a future that never comes, and the team will still have a ton of prospects and a great young core to build around even if all 4 of their big UFAs leave.
In comparison, when the Habs had two critical pending UFAs after making a giant "win now" trade for Weber, instead of going all-in around that window the Habs added Dwight King, Steve Ott, and Andreas Martinsen and then let both of those UFAs walk to throw money at Karl Alzner.