I've generally interpreted the point as trying to deconstruct and de-glamorize the idea of superheros, the people shown as choosing to become superheroes do so not just out of a sense of justice but also severe personal and emotional problems that they compensate for through taking the role of a vigilante doing self-justified violence to others, mostly against relatively regular criminals or people who also are taking on roles to dodge their personal issues.

Of course also theres the Comedian who openly indulges in the violence and power granted over others for his own enjoyment and pleasure, and quite naturally just signs up to work for the feds so he can be officially sanctioned to do exactly the same shit but to foreigners and political enemies.

The ones that do actually have superhuman abilities end up either becoming inhuman and detached or catching the biggest great man theory brain worm and orchestrating global atrocities to achieve a momentary state of confused peace, then getting ben shapiro owned by a single guy going "how long is this gonna last if no more aliens show up lmao" and having a breakdown.

Theres also like a theme of the importance of everyday kindness and being human and connecting to each other, rather than hiding behind a mask or becoming inhuman supermen, I guess.