Yes, I do think Schmidt is among the top FB pitchers, along with Prior (injured), Wood (inured), Brown (an injury waiting to happen) and several others (Johnson, Martinez etc...) with a list of arm-related maladies as long as, well, your arm.
I would never trade anyone on the mere conjecture that they will get injured from throwing too many pitches. That seems to me to be taking overeaction to an extreme.
But to each his own!
BTW, I knew at the beginning of the season that Sosa was prone to very violent sneezes. That's why I didn't draft him, so I do make some exceptions.