Honestly, I think the main reason that there are lots of strip-planked kayaks and very few cold-molded ones is that strip-planking is a lot less work and requires significantly less skill. I haven't looked at the numbers in detail, but I'd guess that cold-molding would not be much lighter or stronger, if at all. OTOH, if you really want one, why not? I certainly can't think of any good reason it wouldn't work.
"For a successful technology, reality must take precedence over public relations,
for nature cannot be fooled."