I'm not arguing that you are wrong. I'm just saying that I, like you, have actually used both 10" and 7" tablets side by side, and came to the exact opposite conclusion you did.
As for what I use it for, reading pdf's and ebooks probably make up 80% of my usage. As for my eyesight, it's OK, but nothing remarkable, very slightly shortsighted, but not so bad that I need glasses. And anyway I'm certainly not arguing against the existence of 10" tablets, but for the co-existence of both sizes and that one is not inherently better than the other.
As for what I use it for, reading pdf's and ebooks probably make up 80% of my usage. As for my eyesight, it's OK, but nothing remarkable, very slightly shortsighted, but not so bad that I need glasses. And anyway I'm certainly not arguing against the existence of 10" tablets, but for the co-existence of both sizes and that one is not inherently better than the other.