I believe the statics of the system were a misstated; the mast was supported via the steel crossbeam that redirected the downward force to multiple pads. We at least saw two fairly large contact pads meaning each pad was distributing 1/2 the downward force distributed over a fairly large contact patch. That patch was thickly glassed on all sides effectively preventing "squish out" and further widening the distribution area. One side was even bound by a very substantial stringer. One can argue the wisdom of placing the patch over an integrated tank but it would be difficult to assess without knowing a lot more. There could be an integral support there, extra thick fiberglass construction, etc. Fiberglass is incredibly strong. While eclipsed in today's world by carbon fiber and other exotics it is still an impressive material especially in compression/tension like this case. The effective distribution area is likely MUCH larger than a mast sitting on a single point on the keel. It is also probably giving it greater lateral stability.

Wood has a fair amount of air space and is subject to a small amount of crushing before stabilizing in a hardened compressed matrix. That minor crush likely took place 40 years ago and hasn't worsened sans active wood rot. Given how incredibly tensioned the compression post was having to use a screw post to raise the coach roof to get it out. Clearly it has been that way a LONG time. The compressed wood probably even created a stable contact patch rather than point loads that a harder material might have. Wood is expected to give and expand and compress slightly.

To the best of my knowledge Hans Christians are NOT known to suffer from dismasting problems.

All that said, I would do little more than maybe use some penetrating epoxy to stabilize the active crack to prevent moisture incursion to maybe discourage rot in the broken fibers. I would not try to transfer the mast load to those wood stringers its unlikely they are designed to hold those kind of loads. The large contact patches at each end are likely much better.

All this is predicated on a fair amount of unknowns regarding the overall construction that can't be seen from the video.