The ideal human being is the one who eats pure Veg food.
But people's food habits are decided by the Guna in which they are.
There are 3 Gunas/Modes - Satva, Raja, Tama.
1. If you are in Satva, you will like Veg food & hate non-veg food
2. If you are in Raja, you will like a mix of both
3. If you are in Tama, you will love non-veg & dislike veg.
Hence Sai baba never forced any food habits on anyone. It takes plenty of time for a person to bring about a change in his Guna/mode. Until then it is not good to force on anyone.
But the logical sequence of progress is as follows
Tama -> Raja -> Satva -> Beyond this three
Om Sai Ram