It isn't nitpicking, it's really a different type: 15 oct 2022 at 19:01 CET with DST, i.e. an instant, vs. 15 oct 2022 at 19:01 in an unspecified time zone, i.e. a set of about 25 instants (one per possible timezone).

While a datetime without a timezone isn't terribly useful, distinguishing it from a datetime and timezone designation pair is the only correct type system.