Earlier quoted context omitted.
Just don't settle for being a 'jack', become an expert, and produce something you think is maintainable for yourself and your colleagues.
> Just don't settle for being a 'jack', become an expert Expert in what? There will always be people "more expert" than me in any particular domain (specific tech, hobbies, whatever). At some point, there's diminishing returns in becoming 'expert' in things you don't need to be an expert in, when "competence" is enough.
Enough to produce something maintainable, that you can be proud of