Speak to the Onco, it may be he considers Enzo to be another form of hormone therapy (which it is).
If they don't answer your questions satisfactorily it's probably time to get a second opinion.
Over the past 10 years what used to be considered 2nd line hormone therapy (Enzo Abi etc etc) has in some cases become first line. Over the same time period Chemo has sometimes been deployed "up front" too. It really depends on the best fit for the patient and for this you are dependant on the skil of the Onco.