I get the same impression about Saudi ground forces. I sometimes joke to myself when I read about Saudi military intervention and wonder if their armed forces aren’t made up of Philippine and Pakistani migrants. Perhaps its just a stereotype but the stereotype does exist that Saudis live a subsidized lifestyle and the backbone work in the country is done by immigrants.
Maybe the Saudi forces are going in mainly to distribute weapons to the Kurds (with hopefully not too many of said weapons ending up in the hands of Iranian proxies).
I’m half serious.
Sufficiently armed, the Kurds likely can pretty well hold their own. SA might be less restrictive on what arms are supplied, compared to the US.