Why T-class submarines could work in Pacific shallows

Why did the Royal Navy use T-class ocean-going submarines in shallow Pacific waters after Mediterranean experience?

Pacific shallow areas often had deep water nearby for concealment and escape, whereas Mediterranean boats could remain trapped in shallow conditions across the theater.

Ocean-going submarines can operate temporarily in shallow water if they have a nearby route back to depth. In the Indian Ocean and Pacific, many target areas border deep water where a boat can hide after an attack. The Mediterranean often kept submarines inside relatively shallow conditions for much longer, denying them that escape. T-class employment in the Pacific therefore did not repeat the same risk merely because a particular patrol area was shallow.