Well the Marwadis and Gujaratis have been traders and businessmen since ancient times. It's kind of like the son of a farmer being a farmer himself. How many daily wage labourers have started their own businesses? Or for that matter, how many IT MNC employees have?
I do not know if there is a bigger proportion of Chinese/Russian/Egyptian businessmen, but I do know that the amount of social stigma attached to leaving a well paying job to do a startup is significantly higher in India than in most other countries.
Chinese are also massively risk-adverse (despite having a massive respect for businessmen). The only Chinese who start businesses are those who have the luxury of being able to afford to take risks (rich parents), and those who can't afford not to.
I do not know if there is a bigger proportion of Chinese/Russian/Egyptian businessmen, but I do know that the amount of social stigma attached to leaving a well paying job to do a startup is significantly higher in India than in most other countries.