I could just as easily flip this around on you. You said yourself, "I don't want him moved, he's a great player..."
Put Krejci on Vegas and he takes them to a whole other level. Put him on Columbus and he might put them over the top. Columbus' most productive center is on pace for 32 points- yet they're still one of the top teams in the East.
You don't think there would be GM's who'd be willing to risk not getting full value in years 3 and 4 for a chance to contend this year and next? I do. We see it every year.
A good point, and I don't think it's out of the realm of possibility for a deal to be made, but most of the people calling for a trade are doing so on the grounds that he has all of these issues. I am sure someone would want him, but if he really is the liability that is being claimed, do we get a good deal out of it? And honestly, anyone trading for him, like Vegas, is aware of his age, injury history, contract size etc. He's great for us, because for lack of a better way to put it, we're stuck with him and his contract. I don't know if we get full value unless what we are really looking for is cap relief.