A couple of points:
The SD comics (especially for the first 10 years or so) focused almost entirely on Johnny Alpha, so the equipment cards in the game reflect a lot of his cool kit - time bombs, no. 4 cartridge and so on.
But the game has laready seen a couple of dozen named characters released, of which only 2 are Johnny and Wulf (and most of the rest are SD agents). So in terms of making it a broader game and not just Johnny and his mates vs everyone else, having a random equipment distribution system is completly logical. However, this isn't set in stone.
As has been noted, many of the scenarios have assigned cards, and there is absolutely no reason why you cannot assign specific cards to specific models anyway. It will not break the game, it is quite capable of handling this adjustment. And the more I think about it, there is suprising amount of chunky detail already in the rules crying out for more scenarios and campaigns.
I love the SD universe, starting reading 2000AD in the late 70s and still have issues #1 to#520, in near mint condition in sealed bags

In my view this is a very good game that does a great job of putting the SD universe on the tabletop. Sure it's not perfect and won't please everyone, but that beast does not exist. Try it before you complain, alter the bits you don't like, if it still doesn't suit you fair enough.