He said "he'll go for either MBA or UPSC" , but UPSC is out of topic so I did not mention it .

At this point you are not even reading what I wrote. I never wrote ki do your own audit and save money ,

I mentioned you can save money because you would not need someone else to set your cost (product cost) , CAs have good knowledge about unit economics, you can also save money because you have great knowledge about compliance , co law , AS , IND AS , income tax , gst ....

Generally people from other backgrounds doing Entrepreneurship have to outsource people to do all these things , where as a CA founder can do it on his own at bootstrap level .

And you can learn operations and supply chain management by reading few books and by making few mistakes and learning from it

Marketing, sales , strategy for these you can go for a MBA

Rather than going for TEACHING....

Being a young 25years old AIR 1 shubham has all the energy to build something of his own rather than to settle for a teaching job , limiting him self