I find it very helpful. After I've called up and get no reply I wonder if the ATCO's busy on the phone. If I hear "blocked" or "two at once" I know that's not the case.
ALSO, JA1, if another crew in Tenerife back in 1977 had said those short words when the Pan Am, KLM and tower controller had all stepped on each others transmissions some 570 people may not have died. I have to say you must be in a very small minority on this with the way you see it.