What a weird argument. The data is there for soldered plumbing. That's exactly why the argument is the way it is. You're saying you trust sharkbite more because published data saying it's worse doesn't exist. But, more importantly, published data saying that it's better doesn't exist - and that's everyone else's problem with it. Rubber doesn't last as long as metal, so people are rightly skeptical.

I'm not sure why you need a report to tell you "yep, turns out this is worse than literally melting metal into the shape you want it". Who knew?

It's the nature of the beast, and everyone knows it, which is why here and elsewhere everyone says "don't put it behind drywall".