Do you really not have answers to those questions? God did what he did to Jonah as punishment for trying to get away from what God was telling him to do in Nineveh.
Why didn't He just have a large bird pick Jonah up from the docks and deposit him on the wall of Ninaveh? Do you see what I'm saying here?
This is all a bunch of sophistry to me, why this, why not that, the thing I care about is the Bible teaching. We can go in circles all day over our speculations of why and why not.
As far as I'm concerned, we're just at the beginning of our discussion, and already you are saying things like, You haven't answered my question so you must not have an answer so you must be wrong. To me, that's not valid.
I've not answered these speculation questions because I'm trying to establish that human speculations of God's intents and reasoning when not revealed by God is pointless to understanding doctrine. We will all have our opinions, but the real matter is, what does the Bible say, not, what can we fill in about what it doesn't say.
I have lots of thoughts on this topic, lots of information from the Scriptures, and I've posted here as tiny tiny part of it so far. Be patient! And no presuming. If this conversation is something you want to do.
Much love!