Not too many drivers have skill to back up trailer in straight line and observing boat ramp is as good entertainment as observing owners of 40' DP parking their rigs at campgrounds.
I tried to use front hitch on 34' motorhome I had years ago.
But took me 2 tries to figure out that the time spend to re-hooking takes like 10 times longer than backing up with trailer in the rear.
Than with trailer on front, your rear wheels will loose some of the traction, what can turn to be crucial.
I don't see much problem in backing up boat with TC as boats are wider than TC, so you can see them pretty well in side mirrors. My rear camera was useless as all I could see was front of the trailer only.