If you value options based on the directional movement of the underlying, then you might have this view.
But a large group of professional options traders value options a different way, based on volatility per se, with much, much less consideration for directional movements.
The volatility alone has value, regardless of the directional movement of the stock up or down.
This value is demonstrated in the theory behind the Black-Scholes option pricing formula and related approaches (which was deemed important enough to be recognized with a Nobel prize in economics).
Because volatility per se has value, professional options traders will be happy to buy your options and earn a living and support the options market with liquidity as market makers and run big businesses doing so.
It would be wrong to think that an option seller has any kind of inherent advantage over an option buyer, or use analogies like house versus gambler in a casino without understanding why volatility per se has value.
While it’s fine to sell options, don’t think that the party buying your options is not making money.
They are making money and they wouldn’t be in the (large) business of trading options if it was not profitable.
Here’s one article that provides some explanation:
The stock was wildly trading in a range and our delta hedging activity in that period had us repeatedly buying the stock as it made its way down and selling stock as it came back to the high end of its range. Over our smorgasbord, the broker started to praise us about our prophetic Nokia stock trading. We were shocked at his uninformed statement – even though we had purchased our Nokia options position via the same broker, it became obvious that our Swedish derivative salesman had skipped over the section about dynamic delta hedging during his training program.
Therefore, as the stock moves down your rebalancing activity has you buying stock, and as the stock moves up you are selling stock – continuously buying low, selling high, which makes your stockbroker think you are the Oracle of Nokia.