Basically when in that error peoples were not that much aware of languages and all the scripts the scriptures statues and these carvings on the walls serve as a medium to educate to tell to describe the culture the tradition the vedic maths the stories easily for the local people so that they can easily understand what these statues these carvings these temples are trying to tell. Secondly the statues for built modelling in a Vedic form like the date is which were actually scribed in Vedas upnishads the holy books the carvings were in those strips and languages which were actually describe in religious books but for the normal people who are not easily able to understand you are not capable to get what is written we can easily understand through the movement through hand through the statue
And these caves now a days serps as a reflection of data we the normal people are the architects or the archaeologist who are very much enthusiast about learning the historical Era can easily learn that was what was so social stigma social culture and religion in that time, and thats how Ajanta caves are very important in understanding social economical and political scenarios of that time for us.