Earlier quoted context omitted.
I think it's implied in this OP that the author did not see any meaning in his lawyer job, there's nothing "bigger than him" he's working for, just making a lot of money keeping actual criminals out of prison. There's no "bigger" purpose in that. As a party clown/musician there is purpose - he can make kids happy, he knows that "something in his future is expected of him", his work is extremely meaningful to the kids…
"just making a lot of money keeping actual criminals out of prison". If the defendants were not found guilty then they are not "criminals". Unless you were in court then you really ought not to judge. (Though I am aware the the American justice system is probably way less perfect than it claims to be).
That's not a bad thing.