T-Rex: Close your eyes and picture it: it's a sunny day, but you're in the pleasant shade of a large tree. The world is at peace. Put yourself there: the scent of freshly-cut grass. The breeze on your skin. Isn't this nice?
T-Rex: IF YOU'RE DOING IT RIGHT, IT'S PROBABLY REALLY NICE.
T-Rex: Put the work in and you can imagine something real pleasant, if only for a few seconds. You can - if only briefly - summon a pretty convincing better world!
Dromiceiomimus: Aha! And your point is we should all work together to make that better world we imagine a reality?
T-Rex: What? No. My point is we've already got holodecks! IN OUR MINDS, Dromiceiomimus!
T-Rex: But it takes effort to REALLY imagine something nice, so we barely ever do it!
Utahraptor: Says you!
Utahraptor: I already spend a third of my life sleeping, and a large chunk of that dreaming. Or to put it in your terms, "trapped in a holodeck that won't take commands, and also the safeties are off, and also the program has full access to my weird subconscious". Being awake is the only way I can ESCAPE that holodeck!
Off panel: ...
Off panel: ...Plus, in your version there's no multiplayer.
T-Rex: Oh crap, excellent point