The OP isn't starving the fish, the fish is being offered food every day. What he is doing is called training a fish, and this is a very successful method used by many hobbyists/breeders when importing Thai bred fish, as most are fed large quantities of bloodworms in Thailand, many juvenile flowerhorn/cichlids are fed bloodworm exclusively and have never seen a pellet.
What the OP is doing is exactly how I have trained cichlids imported from Bangkok, even small juveniles. Step one, deworm the fish as many fish from SE Asia have worms due to the live foods such a BW they are fed. Step two, feed a few pellets that have been pre-soaked in FBW juice once each morning until fish realizes this is the only food that will be offered. I have yet to have a cichlid starve itself to death when food is offered.