I never said it's ok to lie, but perjury is a specific crime.
The oath of office does not infer a duty to be honest in any legal aspect.
There are many times a person, such as The President of the United States must absolutely use deception. He is, after all, one who possesses many State secrets.
It doesn't make for a good argument to point to all the other politicians who deploy acts of deception, but a man lying about having sexual relations with a porn actress 12 years ago, doesn't suggest a despotic society is emerging.
I wouldn't expect you to understand, since people on the left tend to have lower IQ.
You sound like Trump.