The secular version of Mohamad ﷺ is more puzzling than the religious divinely inspired one.
The combination of roles Mohamad ﷺ had is the rarest in history.
Most world-historical religious figures occupied one lane. Jesus and the Buddha were teachers who held no state and commanded no army; their political and legal systems were built by others, later.
Muhammad ﷺ was simultaneously a religious founder, a lawgiver, a head of state, a judge, a diplomat, and a field commander,( and his enemies also accuse him of being a great poet, a knower of Greek science, philosophy, and Judeo- Christian apocryphal scripture spread across hundreds of monasteries and scrolls,) and he was also effective in all of those roles at once, in the same lifetime.
Very few people in history have done even two of those well.
The starting conditions were also unpromising. An orphan from a respected-but-not-ruling clan, no inherited wealth, no kingdom, no army, by tradition unlettered, who didn't begin preaching until around forty.
He then spent over a decade as the leader of a persecuted minority, was driven out of his own city, and still ended up, roughly 23 years later, with most of the Arabian Peninsula unified under a single religious-political order for the first time.
The slope of that trajectory, from those starting conditions, is very very very steep.