There's a neighborhood along my drive home that Waze will often try to navigate through to save a few minutes of driving. This rarely actually saves the time it claims, and is disruptive enough to people living in the neighborhood that entrances to the neighborhood now have signs excluding non-local traffic from entering.
Waze still tries to navigate me through this neighborhood all the time. It makes the app nearly worthless for finding routes home. There are also some other streets I've learned not to trust when Waze tells me to take them home, as they often have much more traffic than predicted. I'd love to be able to block those as well.
Some roads were shut down for construction near where I work a few months ago. Uber and Lyft don't seem to take data like that into account, so I had a hell of a time getting home from work - I'd have two or three canceled rides before I got one that happened not to be routed through any closed roads.
I believe the entire use case you present was already acknowledged in the comment you are replying to, I. e. the “easy interface” to “exclude certain routes”.
The comment I was replying said that the functionality might be useful. This does not acknowledge any particular use case for the functionality, and leaves open the possibility that it might not be useful. Someone who isn't sure whether this functionality has legitimate uses or not probably isn't aware of what the legitimate uses are.
Waze still tries to navigate me through this neighborhood all the time. It makes the app nearly worthless for finding routes home. There are also some other streets I've learned not to trust when Waze tells me to take them home, as they often have much more traffic than predicted. I'd love to be able to block those as well.