The pelican stryker(bridle foil) is functioning similar to the dolphin stryker (except there is a very ecentric load).
You may have seen some boats which use a cable for the dolphin stryker, similar to the Nacra bridle foil.
The bridle foil assembly is a truss with two loaded triangles.
In a loaded triangle, one or two members are subject to compression loading and the other one or two are subjected to tension loading.
The forestay loads the double triangle with very large forces.
The foil extrusion is subject to large compression forces due to the pull (though skewed) of the forestay.
The rod is subject to large tension forces. So large that the rod stretches enough to lose several inches of pre-bend.
I have never heard of a foil collapsing from compression, only from the tension member (rod) failing.
Drilling holes into the foil near the post would slightly weaken the foils bending strength.
The holes, with stainless srews, could stimulate galvanic corrosion inside of the foil.
Why not get a small verticle flange welded onto the front of the post? Stainless on stainless is usually safe.