Some points:

Trusts don't ask you to pull more.
Trusts don't ask you to pull less.
Trusts don't ask you to pull.
Trusts wait for you without complaining.
Trusts don't judge your low dps.
Trusts don't judge your bad healing.
Trusts don't judge your bad tanking.
Trusts don't judge you.

And the list goes on...