Bingo. This is a big attraction for me as well, jumping out at the boat ramp or wherever, onto sharp or slippery things.For some reason, I think they are pretty cool. My kids are aghast that I might get a pair and refuse to be in my presence or some such objection. (I don't really care, but find it interesting) Would old dudes look silly in these?
If warm enough, I do prefer to be barefoot, but wondered if these would be a reasonable compromise. They're not as protected, but better than barefoot. Any issue with the black bottoms?
When I do wear deckshoes aboard, it's sometimes for grip, but mostly for comfort. If I've been standing on watch for hours, my feat get sore. I always leave my boat shoes under the cockpit table for this reason. It's even on my castoff checklist!! I'm not sure the finger shoes are going to provide the same relief, as much as grip.
Finally, the great advantage I see to these, is landing a dinghy on a rocky beach. It may be what puts me over the edge to get them. Being able to step out into the water, without fear of cutting the bottom of my feet is important. I can't step in the water with my deckshoes.
Lastly, the only objection I really get is there are so many models, I have no idea which to choose.