Risk / Reward.

Those that like Indy are not satisfied with mediocrity and are willing risk more to become more. (Optimists)

Those that are in the "go to a G5 conference" camp are more satisfied with "pretty good" and don't want to risk as much. (Pessimists who claim "realism" to mask their cowardice)

Then there are those that are pretty much an angry/depressed Ralph Wiggum who trashes both sides thinking that there was some other P5 option or something and doesn't know that his logic smells like cat foot.