That a lot can happen in 4-6 years is the whole point. You can't just conclude that because our stars will be 30, we'll be in a rebuild and thus anchors and things affecting us negatively won't matter. A lot can happen to CBAs in 4-6 years too, and age-related declines don't always happen in ways that allow for permanent LTIRs, so the idea that there will always be a 'get out of jail free' card is also shortsighted. Tanev will likely provide issues for us, while we are still competitive. OEL will likely provide issues for us, while we are still competitive.
"Worry about that stuff later" is not how GMs should be thinking, and what it usually means is "leave that problem for the next guy". It's like Lou reincarnate. A good GM may be able to navigate it, but it's far from a guarantee that we will have a good GM. In the last couple decades, we only had one, and it only lasted 5 years because we bungled the re-signing.
What a good GM should be able to do is navigate the present without screwing over the future in the first place.