It's not spewing nonsense, if you're simming to figure out what the mathematically proven best gear slots are, you shouldn't be simming around only what you have available, that's just plainly logical. What's in your bags doesn't tell us necessarily what's the best possible set up, and there is always a best possible set up.
I didn't even get into the ramp up time of the new legendary chest and that also is a factor that has to be considered, all reasons to doubt everything you're saying. Why? Because we haven't seen your sims. So your experience is anecdotal and anecdotal evidence is not something that is used in science, it has to be repeatable it has to be consistent, it has to be peer reviewed. So funny you mention rocket science to me in that context you did because I don't only understand rocket science but my family is straight up OG top brass USAF and all up in NASA. So when you go off about feely crafting because I am skeptical about data you won't show us that actually makes you look bad.
I'm nerdy and I like math. This is why Logs > Sims (depending on if the data is public). Because you can you can find thousands of examples of correlating data in an environment that is essentially blind tested because the data is produced by thousands of people independently and from there you can pinpoint the cause.
https://www.warcraftlogs.com/ranking...c=BeastMastery
What all of the data available here tells us is that #1 all dps legendaries are fairly close. But also #2 That some particular items are better than others. Namely the belt, the bracers and the new ring. But also the shoulders if you're using the dire beast/owtp build right now and depending on the fight.
Granted less people will have the chest right now, so data is inconclusive, but nevertheless we still have a pretty clear picture of how people should be gearing right now and what they should be aiming for to maximize their dps going in TOS.