Intraday in Illiquid stocks

What is the reason behind blocking intraday trading in illiquid stocks in zerodha where as other brokerages allow it,

If you want to trade in these illiquid stocks, you can set-up TOTP and you will be allowed to. Read this post to know the process.

This is to protect clients from falling prey to trading in manipulated stocks, you can read the following articles to know more.