This is a classic case of internet echo chamber. The same people are posting the same thing in different forums and then there is a circular reference.
The sky is not falling. However, this is not something we should simply ignore.
We do not want sups, windsurfers, kitesurfers, etc to be defined as motor boats and be subjected by default to all of the limitations currently imposed on them,
The definition of propulsion machinery should not be changed as proposed.
If the intent it to fix loop holes in the ability for law enforcement to take a blood test or give a breathalyzer test because the specific section of the code specifies motor boat, then that section should add the term vessel.
Just as the section on requiring personal flotation devices does.
Although, I have to wonder is there really a problem that needs fixing?