As mentioned, our Mahe has the same thing and no issues for us either. But worst case it rips off and you get a minimal amount of water
jetting through the two 2" drains when a big wave comes through and slaps right there. Easily solved
by putting any heavy object over the drains until you can fix it and if you're somehow not able to do that just close the doors and it will be a non-issue, just a small amount of extra water in the cockpit every few minutes that will easily drain far faster than it comes in.
This is probably the last thing you need to be worrying about when buying
a Lucia. Or to turn that into a positive, if this is your biggest concern than you're looking pretty good!