Bro a tech professional is telling you that you are wrong. I can confirm that he is right also, any Google search will in fact do that as well. Take a chill pill and walk away.
Going above 3200mhz on zen 3 does, in fact, not always need tweaking. From personal experience 3600mhz works just fine with xmp. But, this is a good diagnostic to do, if it is the problem.