How this is more risky than buying the stock? You are basically buying a stock at the discount, and the stock goes down, you always will do better than just buying the stock.Among many issues with shorting puts, the main problem is that in theory it can appear to make sense if one wants to own the underlying and is ready, willing and able to accept it.
But theoretical gives way to reality when after writing the put the underlying, for reasons that can't be foreseen, crashes and burns, and you are left with an instrument in your account that you would have never bought given the present circumstances.
Thus, what you are doing in writing the option is assuming/hoping that circumstances at X date in the future are such that you'll be a happy puppy. And that very often is not the case when the shit hits the fan.
The main risk of the naked put is opportunity loss in case the stock rallies and you are missing those gains.