First, it's not Green's fault that the roster construction doesn't work for you.
And second, when the Rockets traded him, he was NOT injured and hadn't been injured both years of his career. We also know why the Rockets dealt him. It was because they were acquiring Kevin Freaking Durant.
Jalen Green has been a fantastic teammate, experienced the first injury of his CAREER, which unfortunately was a hamstring, which sucks because that kind of injury lingers (see: Devin Booker), but the main reason he's out now is he took a terrible fall a few games ago. You call that injury prone, right now I call that accident prone. It may lead to him being injury prone in the future, but it's far to early to declare that now.
You complaining about not having a true PF (which barely exists as a position anymore) has nothing whatsoever to do with Jalen Green.