Nah mate, people in general across all walks of life have an incredibly difficult time putting themselves into a perspective that isn't their own. Humans are built to be biased towards our personal experiences. It's a trap we can all fall into.

I will agree though that leftists usually recognize it more because a lot of leftist theory was founded as a direct criticism of what became known as right wing ideology and how it engaged in class warfare. It entirely will depend on how educated in theory one is to recognize and understand the alternative viewpoint.