I think if people were 100% honest, the survey results would be reversed. I think many people are voting what they would like to do but not what they actually do.
I have been keeping fish for over 40 years and am responsible (unfortunately) for short life spans of hundreds of fish and have dropped off over a hundred unwanted fish at the LFS. And this is a confession from a guy who loves animals.
My latest tank addition is a 125G. Due to aggression, it currently houses just two fish (7in F. Rostratus and 6in Titanium FH with a divider between them). When I bought the tank last year; if I knew that I was about to spend ~ $1,000 on another tank set up just to house a 3in F. Rostratus and 3in TFH, I would have decided against it. BTW - I had to drop off three large cichlids (from the 125G) at the LFS because the F. Rostartus became very aggressive when he grew from 3in to 7in. My other 10in F. Rostratus is an angel in comparison to the 7in.
As much as I love the two fish in the 125G; I can't imagine maintaining the tank with the current occupants for another 10 plus years. That could only happen if nothing major changed in my life. However, if I lost my job, had to move, became ill, got tired of the work load, or didn't have the time any longer (new job or hobby), the fish would go. The chances of one of the above happening in the next ten years is very high.