Wearing tzitziot outside for pride is like putting up a mezzuza as an amulet.
Putting up a mezuza as an amulet is an ulterior motive for performing the
mitzva (and that also sounds like it might fall into the debate of whether
a mitzva requires specific intention to fulfill a mitzva).
Wearing your tzitzis out to show that you are proud of doing the mitzva
is not a reason that replaces the reason that it’s a mitzva (and you also
intend to fulfill the mitzva by wearing tzitizis).