Hard statistics on options are not easy to find.
It's a fact that a majority of options (75%) expires worthless, which means the option buyers get nothing and the option sellers pocket the premium for nothing.
However, those are the options that are held to expiration. Of all options that are opened, about 3/4 are closed out prior to expiration by the buyers selling them. Do they sell at a loss or a gain? I have not found a statistics on the average gain or loss.
One thing is sure though. The time value decay works in favor of the option sellers, not the buyers. That works for both call and put options.
If so, who would buy options? People buy put options for the same reason as they buy vehicle crash insurance and home fire insurance. Most of the time, nothing bad happens, and the insurance companies pocket the premium. And people buy call options the same way people buy lottery tickets. The potential loss is finite (the cost of the ticket or the call premium), but the potential gain can be very large.
An analogy is that option buyers are like casino gamblers, while option sellers are like the house. In the long run, the house has a net gain.