No problem if you want to file a flight plan every time you fly, however, in the absence of a FP are you religiously going to inform every airfield you are flying to, of your route, POB and ETA, nah.....
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But that isn't "booking out" which is merely informing the aerodrome operator how long you intend to be airborne in the event of a local flight or where you intend to land if landing away.
There are some airports which will not accept booking out on the radio and they do indeed require details such as endurance and POB.
I don't understand why anyone would find booking out (or whatever you want to call it) so difficult which can only be in the interests of all on board the aircraft.