That's entirely contingent on your particular definition of "new". You can absolutely argue that making a live-action version of an animated film is something "new", even if it's the same story scene for scene. That's a different kind of new, and not something brand new, but it's very easy to negotiate the word "new" here nonetheless. You can disagree, of course, and say you don't consider it "new" and that's entirely fine; but many other people will, in much the same way. There isn't some kind of objective measure that can be applied here to decide this definitively.
You're not totally off-base with this and this problem does have a tendency to crop up in all sorts of ways, but as a very general rule, if they aren't making something then it's probably because there isn't a big enough audience for it (or at least not in that moment). These things shift, of course, as trends ebb and flow, but giant entertainment corporations pay entire floors of people oodles of money to research these things. They by no means always get it right - no one can. But they're at least more informed about it than most people, so even though they can and do easily miss the mark, they're at least among the ones most likely to hit, too.
I'm not sure I understand your logic here.
Companies don't need to justify their financial strategy in some elaborate way that requires them to sabotage their own product. They can just... do something else. They're beholden primarily to their shareholders, and your entire premise is that the alternative makes more money (which is what "easier to make crap" tends to translate into, ultimately). So why would they sabotage themselves? They can just stop doing A and start doing B. Who would be the people going "but wait a minute why are you doing this WHAT ARE YOU HIDING?!" in this scenario, exactly, that would then require this kind of subterfuge? Not the investors - you sit them down and spread your sheet and they see big number go up and nod in agreement. They not only don't need tricking, they'll SUE YOUR ASS TO THE MOON if they ever find out (and you might be criminally liable, too, for misleading investors).
You're constructing this elaborate ruse, but I fail to see any way in which this would ever make sense or be plausible.
That's a very different question in a very different framework, and the answer very often for the majority of entertainment products is quite simply "there isn't one, this is a commercial product that primarily exists to make money". Which they do. And which is what entertainment companies pumping tens if not hundreds of millions of production and advertisement budgets into such projects care about.
That doesn't invalidate your question, it's merely a different question that doesn't lend itself terribly well to crossing over into other domains. Artistic value and monetary value are two distinct things. They have points of interaction, and they're definitely not interchangeable. But they also don't simply invalidate each other, either. You can't distill them down to some kind of universal "value" that subsumes all aspects. That's mostly just one giant ball of category error.