That is why it is an AIM not FARs.
Look at 4-2-1 paragraph a and b. It has to do with IFR communications. Which applies to real life more than just buzzing around the patch in clear and a million.
MVFR (even VFR) transitions from IFR and an ATC controller to a non-towered airport while on a IFR flight plan are dangerous enough. Most operators require several radio calls on more than one frequency in the decent. Do to crap transmitters at little airports, the last 40 miles inbound can get busy. When you're slowing from 250kts, it goes by quick. Meanwhile, you're focused on ATC, doing checklists, looking for an unfamiliar airport in the haze, you may not want to trust your safety on Jimbo, the local hunyuck instructor, making position reports on every touch and go or Bob, the Sunday flier who thinks radios are for listening to, and doesn't want to ware his mic out. Who is the foolish one, the guy asking for a traffic report or the guy who refuses to answer? You can have your chuckle and act all self righteous because the AIM said so, but please do me a favor and answer the guy that asks for traffic. You might save him and yourself from a short painful death. Feel all superior when you are on the ground. Safety and understanding are key.