Worth doing IB/PE if want to start business?

Say, for example, my goal is to start an industrial services or manufacturing business. Right out of college, do you guys recommend  joining an actual business and getting on-the-ground operational experience or is the professional and financial training you gain in banking/PE more valuable? Also, if this is my goal, is it better to join a small LMM PE firm or do banking to exit to a more "prestigious" and larger platform out of college. I just want to get experience and am not sure if I would be disadvantaged by joining a LMM firm vs larger one.