As
@erhayes and some others have indicated, tire pressure effects many different things. I visualize it like those radar charts or "spider" charts that you often see on tire sites comparing different tires: (just an example below)
Where the letters around the outside would be your attributes (tire wear, comfort, wet grip, dry grip, load carrying, etc) and the colored lines would be various pressure settings.
The manufacturer recommendation is a balance but if a particular attribute is more important to
you, by all means, adjust the pressure to your liking. Just be aware/understand how that effects the other attributes. If a softer ride is most important to you and you drop your pressure to 27 (or 31 or whatever) psi just realize that the tires will likely wear faster, build more heat, hydroplane at lower speeds (see
Horne's principle if you wanna geek out on aviation stuff lol ) have increased stopping distances, etc.
Sure,
most drivers
most of the time are not pushing any edges of tire traction performance. It's not important .... until it is. Then it's really important! A more plush, cushy ride can come at the cost taking 25 longer to stop, rear ending a vehicle ahead, striking a pedestrian or sliding across the center line when the chips are down or perhaps hydroplaning in heavy rain or not.
It's a balance and life is replete with choices
.