Speculation is what we do, doesn't harm anyone, and is good to prime the brain for more detailed technical information. I'm fine with it. In fact, I think I learn more about how these systems interoperate by the speculation.
Considering United has had 3 accidents in the past week, dogpiling Boeing for something that might not be their fault has the side effect of potentially letting United off the hook - if they're at fault. Which maybe both are, or maybe neither are, but the dogpile won't help sort that out.