But they can accelerate the rate of wear on the suspension.
The term “hypermiling” or “hypermileage” comes to mind. Inflating that way is one technique hypermilers use.
I have always heard underinflated tires are more prone to failure problems than overinflated. Me recommended 32, usually go 35.
In your case, as in mine demonstrated several posts above, 32psi is not under-inflated.
There’s a misconception out there, among the general public and even among some certified mechanics, that the vehicle-specific cold tire pressures result in tires being “under-inflated”.
I just posted all the data, for two our cars, that suggests quite the contrary, for both gross load and dynamic loading(driving).
In my case, letting one or both axles on my Honda drop below 30psi cold is under-inflated, and anything above 33psi is over-inflated.
For the Corolla, 28psi would be underinflated, and 32psi or higher, over-inflated.
Like I said, most car mfgs. have done their homework on this, and modern safety margins are much wider than they were, even 30 years ago.
In the 1950s the bias ply tires of the day were often vastly over inflated for high speed runs.
The speed trials at Dyayona Beach were run on the wet sand below the high tide mark. A very high rolling friction surface. These tires were very susceptible to high speed heat failure and and over inflation kept them cooler. The 1956 Chrysler 300 that ran 139 mph on the sand would have gone much faster on pavement.