I completely agree on the ambiguity of frontrunning, since, as you mention, arbitrage is a necessity for a well-functioning financial system. Just as in TradFi where arbitrageurs ensure efficient markets at (almost) all times. I suppose my biggest worries are related to the pool of searchers/extracters/MEV-bots who reap the profits at the expense of “regular” network users through e.g. sandwich attacks. Actually, I recently read a funny blog post about these issues (though it is arguable painting a bleaker-than-necessary image of the future). Nevertheless, it will definitely be of importance to solve these issues, and I guess projects such as flashbots might pave a way forward.
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