The problem for bikes is,like I said before you use the run off to save yourself.
If the run off is not swept or blown it is just as dangerouse and you would be prone to tucking the front.
It will save a lot of smaller crashes and reduce the risk in some cases.But if you get outside the first lane of pavement you may be at as
much risk and going faster then ever if it is not cleaned.
Sounds like the law of diminishing returns. No safety benefit is realised entirely because people tend to use the extra margin of safety to extract extra performance. Kinda like winter tires get some people stuck further in the ditch, but the benefit still exists overall.