No I ask for use-cases justifying to deviate from Class->method() as default.

Anything goes in Perl, but I'd like to know why a pattern was applied.

I remember the Moo(se) folks using namespace::clean to wipe out any subs which are not part of the class, because otherwise they could be called as instance methods via the ISA chain.

A Class->method() OTOH is capable to handle that case by checking if the first parameter $_[0] was blessed.