The boom is suppose to lift off the parts and load them in the back of the vehicle. This vehicle lacks that boom which implies that other arrangments will be made for a crane. There is no perfect design for a repair truck. You have to make some trade offs and compromises. There is a limit to the number of features that can be crammed into an 8'x10' space and the density can easily add up to a vehicle that is overweight as well.
Loggers usually have a log loader around which doubles as a yard crane.
When it isn't, most loggers can marshall a couple log loaders for a cooperative lift when there is serious lifting to be done, so getting something lifted where there are loggers is usually not a problem. Now, if it needs to be lifted gently, that may be a problem, however. .