Do you find the selling of used cars to be a moral grey zone? If you weren't able to sell your used car ever, would you be more or less likely to buy another car? Do you think that people who resell their used games buy more or less new games?
When you buy something you buy a license to use that item for as long as you own it. If you sell it you no longer have the right or ability to continue to use that item anymore. I think that the argument that you are making is that a game is an experience and that once you have played a game once you have reaped the full benefit of ownership from that game. However, I believe that you are mistaken. The full benefit of owning something is that you can reuse it as often as you like. You can read the same book as many times as you want for as long as you own that book. The same is true for a game. The benefit of owning a game or any software is that you can use it as much as you want for as long as you own it. When you sell it you are giving up your right to continue to experience that game until you buy it again.
When you buy something you buy a license to use that item for as long as you own it. If you sell it you no longer have the right or ability to continue to use that item anymore. I think that the argument that you are making is that a game is an experience and that once you have played a game once you have reaped the full benefit of ownership from that game. However, I believe that you are mistaken. The full benefit of owning something is that you can reuse it as often as you like. You can read the same book as many times as you want for as long as you own that book. The same is true for a game. The benefit of owning a game or any software is that you can use it as much as you want for as long as you own it. When you sell it you are giving up your right to continue to experience that game until you buy it again.