A lot of people have no idea what and why they do. Like this case. Whole forum is partially serves the purpose to fix some of those issues.
Tire pressure has different purposes - damping, grip, suspension frequency, wear, energy waste. But it's important to know that wider tire needs lower pressure to act closer to more narrow one.
40 and 45 psi is not a good pressure for longevity or grip. If tire is undersized (like Model 3 stock tire) it will have high stock pressure.
But if you go wider you have an option to come closer to what average passenger car tire was designed for - 32-34 psi. Running 45 cold means going above 50 psi limit hot. And it's not good for anything. It's grossly underdamped, will die faster from rupture, has bad grip, would wear faster and I very much doubt it can improve any turn-in reaction since patch size is smaller. So I ask - why. And if answer "spec" - it's incorrect.