I will be committed to work for my company after I graduate - myth

This is unlikely to be the case, although it does sometimes happen. The majority of companies will put you under no obligation to work for them when you graduate and instead, and only when they have seen you in action working for them, will make you a graduate job offer that you can choose whether or not to accept. They are under no obligation to employ you either. This way both you and the organisation have a choice about your future with them and after you both have something concrete to base your decisions upon.

There are a few companies who do require commitment, however, so it is advisable to check the details of your contract before you agree to take a sponsorship.