It sounds like you're referring to small piston aircraft which you will probably have no difficulty with. What I'm referring to is turbine powered corporate aircraft with complex systems way beyond that of a 172. You said you want an A&P to work as a corporate pilot and thus you would be working on corporate jets. When I said that you will not know anything as a newly minted A&P, when it comes to anything beyond a small piston powered aircraft, you won't. There is a reason my former company spent thousands of dollars to send me to factory maintenance training and regularly sent my coworkers as well. An A&P is a license to learn. When you pass your writtens and o&p's, it means that you have the basic knowledge to work on an aircraft not that you know everything. I learn something new on a regular basis and experienced a huge learning curve when I transitioned from small GA aircraft to corporate jets.

Bear in mind that I'm not trying to flame you, I'm just trying to give you a heads up about being an A&P. I know of pilots w/ their A&P's that have gotten in over their heads because their employer expects them to be able fix the airplane with no previous experience or training.