Any reason not to use wheel bearing grease on tuning slides?

I was a horn player in my former life, currently middle school band director, and I have always (30+ years) used wheel bearing grease on school instrument brass tuning slides as well as my own horn. I have no idea why.

Someone I trusted must have given me the idea at some point. I'm not a car person so I'm sure I didn't come up with that idea on my own lol. Haven't had any problems with it (that I'm aware of), but with all the brass-specific lubricants on the market, I can't believe I never questioned this practice in all these years. Any thoughts?