I am a game designer, I've played different games and analyzed them all my life. You're right in that LCS is pretty much a series of random rolls - unlike you, I don't think the problem is going to go away by adding more and more random roll stuff. Making the game more about long-term grand strategy would be a better choice, as grand strategy is pretty much what winning in LCS is currently about anyway. The raid system currently has the best potential for adding depth and strategy to the game, so I'm concentrate there. Adding car bombs simply because they exist in real life is pointless - LCS is a game, and everything added should be balanced and fitting with the other features, resulting in fun. Otherwise we'd have a mess of game breakers and horrendously random features everywhere.
For comparison, the car bomb system sounds pretty much like the current chase system (which I happen to hate). You press a key and with some driving skill, you're either guaranteed or practically guaranteed to get away, which is an ok bonus for training an otherwise useless skill. Except that unlike car chases which are a rather minor part of the gameplay, you're rolling dice for political gain that otherwise operates with a much more complex system. Site raids, as I've said, aren't nearly as good as they could be, yet they still feature a lot more good complexity. It has much more depth, much more strategic decisions: At which point to turn back when that reactor is nowhere to be found? Shall the squad lurk the factory front door, kill the first few guys and then mosey out, or go in and also wreck the machines? Shall that stealth guy attempt to release only the founder from the death row or open every single lockup in the facility? These are the kind of choices I want to amplify and add, not choices like "press D to roll driving or C to roll pokerface". And since I've already got my hands full with this stuff, no, I'm not going to implement your car bombs. This does not mean that car bombs are a hopeless idea, but just that they need to be integrated to support the gameplay instead of just existing.