Is it easier to profit from selling, than buying, options?
The logic given in the question is inadequate, since it misses the point that upside potential in long option positions is much higher than the upside potential for a short option position.
If one were buying/selling options at fair value on instruments that followed the random process used to price the options, a long or short position should not have an advantage over the other. The higher chance of a short position being profitable at maturity is offset by lower profits.
However, in the real world, options can be mis-priced, such as under-valuing extreme events. Furthermore, implied volatility is quite often higher than realised, which is equivalent to there being a risk premium. Those real world pricing discrepancies need to be looked at to discuss the relative merits.