The argument is maybe biased and there should be no comparison between visiting online casinos mostly compare to land-based casinos.
We can't remove the comparison between the two since the thread is about reasons of why other people prefer online casino over land based casino.
Not just accessibility but land-based casinos are not something we can see around like grocery, pet shops, barber shops, etc.
This is the same reason why more people prefer online casinos. Though we might find land-based casinos interesting due to different emotional and environmental experiences the rarity and distance of it from home discourage us (who love to gamble asap)from traveling going to the land-based casino.
If any case that I have the opportunity to visit land-based casinos, I would definitely like to always try them. We should not just limit our gambling experience to online gambling. For me, it's boring to just stay in the house. Try also to get some taste of social interaction.
Not for me, I always find the comfort of home beautiful and I find loud noise and music irritating. This means it is all in the players' preference.