Of course if enough folks complain that is is wrong to have a speed limit but not require speedometers on boats, some intrepid legislator will listen and file legislation to require speed measurement devices on boats travelling on waters with limits.
And then some of those same folks will complain about "nanny state" and "ridiculous legislation".
And this, my friends, is a perfect example of how we get all these rules and regulations that we are all (most of us anyway, myself included) so fond of complaining about!