Tarq. Yep understand. It's just that in answering the original question the factors as previosly discussed have to be taken into account. If it goes pear shaped then the radar contoller isn't going to be too happy with the ADC for handing him two aircraft with no separation between them. The ADC can't just wipe his hands of it and so "over to you Blue Leader"
If this wasn't a consideration then all the ADC would have to do is fire them as fast as he could regardless of aircraft type and leave it to the radar controller to clean up the mess. And yes I know in a radar environment there are tools (SIDs / radar departures) to help segregate and provide some separation between successive departures of differing aircraft types on tyhe same or similar routes, but I'm talking, once again, in the simplest terms to try and answer a simple question