Of course it's not. Once upon a time quite long ago kings and generals got on the field. But as we industrialized leadership moved to "the back."

See concepts like Auftragstaktik, command intent, mission command.

Not even that long ago, nobility died at higher rates than normal people in ww1 and ww2. Many lines were killed during them. I still know of nobles in my own country in the army. Generals died in WW2 at a decent rate as well.

Nobility lost most relevance now so I'm sure it's different now, owning a castle or a weird last name doesn't make you rich or powerful.