Not really, unless you live as a hermit from an early age.
In modern society, it is hard to avoid indirectly harming people and while we can avoid directly causing significant harm to people, we can't really avoid causing some degree of harm to some of those around us.
It depends on the harming.
If it is unsignificant, mendable...it is not really "harming"
What about this situation I posted ?
It is attitude that many Christians have.
For example, a very powerful banker (Catholic) who owns millions, decides to bribe some politicians to force them to undersell some public assets. He will gain millions from this operation.
The result will be that so many people will lose their job and go poor.
The very same banker will go to Mass and think of himself : well...my love for money is my weakness.
After all...all men have limitations.
Nobody is perfect. God loves me.
Is it mendable?
Is it avoidable?
Is it excusable?
Is it justifiable?