Business, life itself, is damned hard work if you wanna be good at it. Actually, that's precisely wrong. Business ceases to be work when you're chasing a dream that has engorged you. ("Work should be more fun than fun" - Noel Coward. ) And if the passion isn't there. then biotech and plumbing will be equal drags.
Muslims have to give up three things if they want to become Europeans: They have to bid farewell to the idea of converting others, and renounce the Jihad. The third thing they need to give up is the Shariah, which is the Islamic legal system.