Lol, I see where you're going to, Hehe. Trust me, I thought of it too, but looking at things through Tundes perspective.... He wasn't new to crimes, though petty. Now he sees a way to do just the same thing he had been doing but get greater result. Tayo(me in character) on the other hand wasn't new to crimes as well, but his mind was pulling out of that kind of life.

I'm sure Tunde feels he could go for the heist, get a better life and convince Tayo to up his games too, probably the reason why he told him about his mission in the first instance, and well I guess he was nervous as well, and Tayo was his partner in crime