I've been on off roading/laning trips with pretty much every marque of 4x4 going, and I can safely say I've never had an issue with mud clogging the abs ring , and I certainly don't know anyone else that has either, never mind carrying a pump up garden sprayer. Last time I I went out the pressure washer struggled to shift the clay based stuff, never mind a poxy sprayer
Sorry, don't believe it, I have also off roaded in many types of off road vehicles and some are very susceptible to the root being filled with mud; you should know better than blast high pressure water at bearing housings and anything covered by rubber boots.