Why heavier destroyers would not automatically create frigates sooner

Would 2,300-ton destroyers and roughly 2,000-ton sloops make the Royal Navy develop frigates sooner?

Not necessarily; frigates emerged from corvette escort requirements and lower construction standards, not from destroyer size alone.

The wartime frigate combined more power and survivability than a corvette with construction below full sloop standards. Larger existing combatants might encourage a larger corvette or alter escort choices, but they do not remove the specific economic and production logic that created the frigate.