I assume that, once you get vehicles driving autonomously on sections of highways, you have some sort of beacon/alerting system that cause the vehicle to tell the driver that it's going to be dropping out of autonomous mode.
But I don't really disagree. Some mechanism (perhaps a redundant mechanism) when approaching a possible construction area to give a human a minute or so to take over.
They just don't address use cases where people aren't able to drive at all. Which are interesting to a lot of people but they may just not happen for a long time.
There are people who just want cheaper Ubers but there are others who are fine with handing off long boring sections of highway driving.