On what basis do you believe it doesn't help? Do you have evidence that lubricating the threads will increase the chance of the centres unscrewing and that it doesn't reduce the chance of stripping a core? Lubricating threads is standard practice in bicycle maintenance.Lubing this part doesn’t change whether or not it will strip. Doing this just leads to a higher chance of it unscrewing. I advise against doing this since I believe it doesn’t help.