Yes but you will note that in my post which started that set of replies I specifically mentioned HIGH level throwing.
I didn't say that mid-level throwing was useless but the point is that if you are only using mid level throwing then without a doubt you are playing a hybrid build and have a back up weapon which you are able to defend yourself with after making your handful of throws.
A dedicated thrower on the other hand ONLY has his meager number of throws and has to get as much damage as possible in with those before being rendered pretty much useless.
Not to mention that even with Power Throw 10 the damage output of a thrower for 2 slots worth is UNDER 100 damage, compared to archers 5-600 and crossbows 800.
That damage output is one of the biggest points, a hybrid archer or crossbow can still potentially put out 300-500 points of damage while being able to put points into defending themselves better with a backup weapon, this is still considerably more than a DEDICATED thrower.