Hey.

Its not that a fresher dentist cannot earn in India, dentists can earn very well in any part of the world but it all depends on your skill and confidence, its true that hospitals don't pay that much to dentists but you can also open up your own practice, and I have seen people earning 60-70k per month just from private practice.
You can apply for government jobs like in National health mission where one can easily earn 30-40K without much headache. You can also go for contractual jobs in government hospitals which pays a pretty decent salary.

Hope this helps. All the best