I will be forever grateful to Lou for building the successful franchise for 2+ decades that he did. But I can also see that he didn't do a great job the last few years of his time here and it left the organization in a rough spot that it's still trying to recover from. That doesn't invalidate what he did before.
He did a very smart thing with the Islanders by hiring a coach coming off winning the Cup. But the majority of that team was already brought in under the previous regime. Barzal, Nelson, Bailey, Beauvillier, Lee, Pulock, Leddy, Boychuk, Toews, Mayfield, etc. Yes, they lost Tavares, but they still had good players that Trotz could work with. Many of whom had previously been on 100 point Islanders teams.
Do I think merely by being Lou Lamoriello that he brings respectability and competency to an organization? Absolutely. I just think some people are leaning too heavily into the culture thing while downplaying the fact that the Islanders have been a pretty good team the last 5 years, with one hiccup with Doug Weight, who pretty much everybody agrees was an awful coach. So maybe the Islanders were a pretty good team that merely needed a good coach to get the most out of it?