We are sharing opinions so you can disagree. This is not a problem for me, and it is away to learn more.

That's a magical fairytale land where we can create a decentralized smart contract that's going to buy and sell assets across dozens of exchanges (centralized and decentralized).

To centralized exchanges, I know that is not possible. However, using decentralized exchanges available in a chain, I know that is possible. A lot of yield farms or baby tokens already use it at least to interact with one DEX, but I think this can be changed to interact with more (the last part it as guess).

So just going to rehash the same argument to answer the second question as well?

In my first comment, I mention all this related with debt ratio

The Incompetence part it was the fact that they allowed UST create more than 100% LUNA debt

You are right, saying the deep problem was the debt ratio.