Our users need not care or even know about this particular implementation detail of views. For them, views are a fundamental concept.
The description of create trigger makes is perfectly clear that views are a valid "table-like" target for a trigger.
> CREATE TRIGGER creates a new trigger. CREATE OR REPLACE TRIGGER will either create a new trigger, or replace an existing trigger. The trigger will be associated with the specified table, view, or foreign table and will execute the specified function function_name when certain operations are performed on that table.