Nevermind franciscas, pilums, javelins...and I'm not even going to include slings.
Thank you, these are actually fantastic examples of why throwing weapons are so horribly inefficient. Javelins/pilums were only effective if you had entire formations throwing them at another huge formation of soldiers because they are meant to be thrown in an arc which makes them slow and fairly inaccurate, but it's the only way you're getting distance. If you are fighting 1-on-1 and you've got 3 javelins, you should probably just run away or attempt to use it as a hand spear because you will get killed. Franciscas were similarly only effective because they were thrown at large formations as a first strike weapon against an army and the formation did not allow the soldiers to simply dodge the incoming axes. The sling was probably the most deadly weapon of the ones mentioned and it was because it was a launcher, not a thrown device so you can't really include it anyways. The fact that is it so hard to find examples of confirmed kills via throwing weapons, especially when not used against huge static formations, is proof enough. You can find tons of people being arrested or otherwise recorded as having thrown a weapon at someone since 1900, hell 1800 even, on Google and while maybe a handful of them actually hit the target, you get a golden award if you can find more than a dozen kills in the last 100 years. Contrary to the popular image, even Native Americans largely knew better and kept their tomahawks in hand for melee. Thrown weaponry was largely a "just because" effort to be used at the start of formal battle and were not expected to do anything besides shake up the front of a formation. After that was expended, the soldiers grabbed their actual killing weapons for melee and fought. It wasn't until bow technology came about that ranged weaponry was really effective, especially against unorganized individuals. The ratio is god awful until then.
Even with this unnecessarily huge rant, I still feel I'm giving thrown weapons too much credit because in the case of Morrowind, there is never a formation throwing things en masse. The weapons can typically be dodged and even if one happens to hit you it really doesn't do much damage. That's realistic, in real life you're probably not going to let yourself get stuck in the chest, throat, or artery if you see the attacker so I don't have a problem with that. However, even lower than the chance of being killed by a singular throwing weapon is the chance of letting yourself fall over repeatedly for about a minute while the attacker continues to throw things at you. Of course, I'm referring specifically to actual man-made throwing weapons here. The irony is that thrown rocks (not launched via sling or otherwise) probably have a much better kill count.