Dave R -- you are absolutely correct -- Our cottage is along the "shoal" shoreline -- In all the years of boating on the lake I have never found a "Hazard" i.e rock / whatever along that area.
The marker (I believe) is set in the present location to accomplish 3 things -
(1) Mark safe deep water passage -- for as soon as your "behind" FL#1 water depth jumps from some 30+ ft to 4 - 8 ft depending -- plenty of water for 80% of the boats on the lake.
(2) Gives the Mount a Nav position (again, deep water)
(3) Give the captian of the Mount a positional reminder of When to "blow the horn" when returning to Wiers
but it is the spot where the horn is blown every time -- we have our grandkids trained to yell "WOOooooo" now.
I would however caution folks from "cutting the corner" in the Holt's Pt area. I know of at least two boats that have shortened their outdrive (hit hard) in that area --- there must be some sort of "old" wall/ breakwater in that area -- I have searched (above water) but never found -- the fact remains two didn't make it.