That is absoluteness false. They have the same leverage over a scholarship recipient as they do over a non scholarship recipient. You can walk any time. You will have to pay them back, but so what. You'll be making over 100,000.00 per year. You will pay them back the first month.
If you like CVS and you think you want to work for them after you graduate, take it. If it doesn't work out, you can pay them back. There are over 6000 locations in the USA. I'm sure there is one that will make you happy....