Help with what?
No, they're not icebreakers. They're aircraft. They're experience.
What you do with that experience is up to you.
If you're talking about airline applications, there's really no place to list float or conventional gear experience, nor will anyone care. Single engine or multi engine, turbine or not. That's about it.
I learned to fly in a J-3 cub. I took my commercial checkride in a seaplane. Flying floats is about as much fun and enjoyment as one can have in a light airplane, with clothes on.
Again, it's experience. What you do with it is up to you.
While an endorsement won't show up on your applications or most of the time on a resume, a seaplane rating will. Few will care, though.