Yea, but only if they're up against non-realists.
Liberal realists are the least realistic around. A liberal realist doesn't stand a chance against an anti-intellectual who's stuck in one's ways, and about rugged individualist work ethic while believing in blaming victims and telling victims to pull themselves up by their bootstraps.
The only non-liberals that liberal realists can stand up to are non-realists because they believe in principles before practice.
I mean put simply, if a liberal realist got punched in the face after being told to get real, one wouldn't have a chance at standing up to folk community common sense because the liberal would be told that one's provocative and was asking for it. Liberals do not support conserving the status quo which has learned from experience how to get things done. Instead, liberals need to take one step of idealism to retreat into academia, but it is during that step that they get disrupted, and after they leave academia, they don't have anymore protection.
For example, you'll notice a lot of "liberal realists" resort to scientific arguments against religion.
The problem is most liberal opponents aren't devoutly religious. They are might makes right power politics advocates. The reason they go to church isn't to actually believe in dogmas, but just to keep up with appearances and attendance.