I have flown the Atlantic 5 times and and many other oceans seas and lakes in a SEP with and without GPS. I have been doing it for 40 years. It is a very good risk if one takes a few basic precautions like having enough fuel. I have never got wet.
I expect to make old bones.
As has been said before its up to the pilot. I think it's a good risk, maybe you don't. We are both right.