Halal basically should be food products made by Muslims right? A non-Muslim cannot make food that's halal. Then you pay hundreds of thousands of rupees to someone to get your product certified as halal. To summarise you have to hire Muslims, then you have to get a private Muslim body to certify the food. All this creates a parallel economy, which cannot be allowed in sovereign states. The government can take over? No, a secular state cannot be part of creating a food with religion in it.
Your equivalence is false, even in India, there are foods that have green and red dots on them which either means vegetarian or non-veg. This is mandatory, but it's a self-certification. This doesn't create a parallel structure that certifies food, and neither does it have any requirements apart from the fact that food products should be tagged to see if they contain meat or any other non-vegetarian items.
Imagine if tomorrow Hindus, Christians, Sikhs etc... start demanding foods be tagged saying no Muslim was involved in the preparation of this food. For a multicultural country like India, these kinds of activities should be nipped in the bud.