There is a concept in economics that describes what I think these guys are trying to convey...opportunity cost:

Opportunity costs represent the potential benefits an individual, investor, or business misses out on when choosing one alternative over another.

The thing about this concept is that it is unavoidable. In hindsight there is always a better decision that could have been taken that provides better ROI. But I don't think that they are considering that being a LP on uniswap (using a stable coin like DAI for example) has a lower risk than trying to maximize your ROI by trading directly.