You are right, I was wrong. Seems the number of options expiring worthless (which you want) is much higher.
"Studies (and experience) show that the options buyer does not have a 50/50 chance of winning. They actually have a very high probability of losing. A study done using Chicago Mercantile Exchange (CME) data showed 83% of all options on stock indexes expired worthless.
Remember that there is a winner for every losing options trade. If the buyer loses on 83% of these options that means the sellers win that often.
We can even tilt the odds in our favor slightly more by looking at whether call or put selling would be more profitable. A
call option gives the buyer the right to buy the underlying stock and a
put optiongives the buyer the right to sell the underlying stock. Call buyers profit when prices go up, while put buyers profit when prices decline.
CME data showed that 60% of calls expired worthless while 94% of puts expired worthless. This data shows that selling puts has a high probability of success."