I live in West Los Angeles which means 20 minute uninterrupted stretches of road are extremely hard to find. I did get a suggestion for a 20 minute climb that I'm going to start using even though I don't enjoy climbing.

You shouldn't be looking down at your power numbers in a 1 hour crit or road race. The whole point is to evaluate the power numbers after the race to see what you can do in a highly motivated race situation. FTP is also self-correcting like you alluded to. If they feel too easy, you raise the target power. If you blow up before the end of the interval you drop target power.