However, as you seem to have observed, it is only some companies that advertise that way and not all.
I am rather surprised to note your following observation "Like western countries, some Indian parents don't believe in financially supporting children once they turn 18". Even in the west, most Indian/Asian families support their children financially through their degree courses and even beyond. May be people like me who migrated to the West 40+ years ago are still not changed.
From United Kingdom
From Ecuador, Quito