There isn't uniform oil film thickness and pressure the whole way around a journal bearing like that.
It's also film strength not oil pressure that separates.
The early Judd V8 only had 40psi od of oil pressure at 13000rpm and over 700hp. If pressure was the key that engine would never have lasted more then a lap.
The Cosworth DFV by the end of it's racing life was only run with 35psi oil pressure and made peak power at 10500rpm.


In the end that aux shaft journal lost pressure, but low oil pressure was NOT the initial cause of the failure. It's feed oil from the front main bearing, If oil pressure was the problem that bearing would also be damaged.