Trying to analyze stuff like this online never seems productive. Handlebar tilt, brake lever position, saddle tilt/setback, Q-factor, etc - you don't know unless you actually know.

I've known people with one leg longer than the other. "Anterior pelvic tilt and posterior pelvic tilt are very common abnormalities in regard to the orientation of the pelvis" (The Wiki).

Folks out there have had neck injuries and surgeries, back issues, you name it. Sure, inexperience is out there, but it's just one of many potential factors.

Also, the saddle itself can be different enough to necessitate a degree of tilt. Here's my Ironman with a Prologo Nago Evo PAS saddle that I like. Notice the slight downward tilt:


Here is another of my bikes that is also comfortable:


Different saddle tilts, both comfortable.