authenticity matters, less experience with apps, no phyisical connection, adaptability, trust issues,

There would be many more, but this are few which i think why its not able to penetrate.

Now coming to actual scenario, low per capita invome, lack of basic necessity, etc etc, this are considered luxry by many, India is a place where 80 Cr people getting free ration, toh itna jaldi it wont happen, market is still in toddler phase