Stacking talent is not new and not illegitimate
Players choosing to join forces is treated in some corners as a modern betrayal of competitive spirit, but teaming up with the best available teammates is a strategy as old as the sport, and it is hard to begrudge any individual player for taking a legal path toward the outcome they are paid to pursue. The complaint is rarely really about the transaction itself.
It is usually about what the transaction is assumed to guarantee, and that assumption is where I think the argument goes wrong. A team of stars still has to build chemistry, survive matchups built specifically against it, and get through a format designed to punish predictability, none of which is guaranteed by the roster sheet alone.
The real complaint is a settled feeling
What actually drains interest from a season is the sense, whether accurate or not, that the outcome is already known months in advance and that watching is a formality rather than a genuine contest. That feeling can be produced by star accumulation, but it can just as easily be produced by a weak overall league, an unbalanced schedule, or a single team that simply develops better than everyone else through ordinary, unglamorous means.
Treating star accumulation as the single villain lets the more boring, structural causes of a predictable season escape scrutiny, and I would rather the conversation focus on those.
Chase drama, not just parity
Perfect parity is not actually what makes a season compelling; plenty of one-sided seasons have been gripping because the dominant team was fascinating to watch, and plenty of tightly contested ones have been dull because nobody involved was interesting. What I actually want from the league is drama, and drama and competitive balance are related but not identical goals.
If the league wants to address genuine staleness, the more honest levers are things like scheduling, the incentives around effort late in a lost season, and whether enough paths exist for a team to remake itself quickly — not a moral campaign against players choosing where to play.