Who sez ?
Easy answer - The LEFT and those that do the obfuscating and reporting - it is THEY 'who sez' ...
Why THEY never dun nuttin wrong - they are the 'truth tellers', the holders of the golden orbs.
It seemed a rather rhetorical comment since another way of stating it would be:
"Why is it that ONLY those have honesty and integrity are required .... " - which is one of those redundantly rhetorical type questions.
Obviously, the ones who are DIShonest and Lack any Integrity never require of themselves that which they require of others.
So, I guess it is "I SEZ" that only one side is ever required to make such admissions.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...