Is their argument that social manipulation via fines / taxes / denied rights is fine as long as they don’t totally make it illegal / impossible to do as you choose?
I think that’s part of it, as long as they’re not excessive. Another example would be in Grocery stores where the products may be set up in a certain way. They’re argument would be that grocery stores should be set up so that healthy foods are more excessible than junk food, so that people would be “nudged” (perhaps even unconsciously) to pick up the vegetables instead of the cake.