>So you really should expect true Christians, on average, to gradually become better people.
Only if I accept their beliefs as accurate.
Only if I accept their beliefs as accurate.
But there are many incentives, both on a self-deceptive psychology level, and on a societal-wide level, for wanting to be seen as a virtuous and forthright person irrespective of one's actual behaviours or beliefs.
Virtues alone don't make people better. Doing the hard work to introspect and actually make yourself better... that's what makes you better.