I think SEBI intention is to keep retailers out as far as nifty is concerned.
75 is too big a quantity to trade even on a 5 min chart with reasonable size stops risking just 1% of any decent account.
Mini nifty will takeaway the liquidity of nifty and they don’t want that.
I think they should reduce the qty to 50. But not holding my breath.
Instead get a big account and learn to live with it.