Yeah, me playing aim trainers with my mouse and keyboard or solving math problems isn't going to help me drive a car better. Some things you can't fix. You can't fix reflexes. That goes with age, you're fighting an upclimb battle. You can work to improving timing a little bit, with technique and repetitions, so you're not thinking when you're doing something. But just reflexes and reflexes alone, I don't believe you can do that. I believe that's a genetic disposition. That one has.
You see it in live sports where some guys just can't react as fast and they are high level atheltes. I think outside performance enhancing drugs, its hard to improve. PEDs would help with brain synapses by A LOT. Dramatically, but that's all I can say about that.