Unfortunately setting a base fee makes it much more difficult to calculate the most efficient path thru the network.
Discussion
Who said that?
Probably saw it elsewhere, but this seems a good description, "If you want to pay someone your node needs to find other nodes which help you by having enough money in their channels. Your node does a lot of computations to help you achieve your goal. If the basefee is 0 it is computationally much easier to find the provable optimal solution"
https://twitter.com/renepickhardt/status/1415667044519800846