Now...it's Player A didn't need to save his team because they were dominating.
What's next...can Kobe do a somersault and hit a game winner?
The whole point is the NUMBER of game-winners is irrelevant. Efficiency is the stat that matters. All having a lot of game-winners means is that Kobe's team was even/behind at the end of the fourth a lot, and he took the shots. He's been in the league for a long time, so it's inevitable he's going to have a bunch.
Because all game winners are the same right?
You can't compare game-winners as if they were FT percentage.
If Lebron had to shoot a 3pt over a double team with 1 second to go because they were down by 2 and he wouldn't be able to pass it on time for a better shot, but he still made it, it's a harder game-winner than if he had 6 seconds to work and they put him a screen for a floater at the Ft line.
If the game was on the line for a wild 3 ptr I would choose Kobe or Durant. If it was anything else with ample time I would probably go for Lebron and shooters. If it was less than 3 seconds to work I would go with Durant. If it was full 24 seconds I'd go with either of the 3, one has experience and credentials, the other one has versatility, playmaking and athleticism, and other one has range and height advantage. You can't go wrong.