This whole discussion is pathetic. It wasn't that many years ago that the majority of airline pilots didn't even know when to use 121.5, how to select it on their box (slightly tongue in cheek) and certainly what the term "guard' meant.
I think africacore is one of the few professionals on this thread. If having to listen to a second freq (because your company SOPs now say so) irritates you, then turn the volume down to a level lower than your primary ATC comm freq. The only time you need "guard" is when the other primary freq goes really rather quiet and you haven't figured out that you have had a switch pigs. Hopefully, by then you will still have some of that ATPL common sense left and realised that something is not quite right. In the meantime, be careful not to spill that in-flight meal as you race to change Tx channels in order to be the first to get that "on guard" call in.