at a certain level 1 v 1 is not real basketball. I agree. Nba level offensive players cant be stopped by any single player. It just becomes a scoring fest. But i'll let ya'll cook and disagree with the top 1% thay actually made it to the league.
We should not forget that the overall best player may not be better at a certain aspect than a specialist role player.
In gymnastics there are the All-Arounders and the specialists. All-Arounders might have their best events (like Simone Biles' is stronger on Floor and Vault), but they have a level of excellence across all events. Specialists concentrate on one event. They are picked to join a national team delegation because of a need.
I think of stars as all-arounders. They might be better at one aspect of the game than another, but they are strong enough that they can basically fit into any lineup and contribute. Tatum, Curry, Giannis, Luka, etc. They can pretty much be on the market and 30/30 teams will think they can contribute right away.
Role players are like specialists. You put a pommel horse specialist on still rings and he's likely to be awful. In womens' gymnastics, there are often uneven bars specialists who couldn't vault to save their lives.
Role players need to fit into a specific lineup and to know what their role is. Some are defensive specialists (like Matisse Thybulle), others are great at rebounding (like Rodman or Josh Hart), others great spot-up shooters (like Grayson Allen).
Role players often struggle when sent to a new team for this reason. Their game isn't as diverse as a star. They need to fit into a puzzle. Stars find puzzle pieces to fit around them.
Being a good 1 vs 1 guy can make you useful on a team. Microwave scorers like Jamal come to mind.