Well, I prefer being tied because it helps me relax, but I know plenty of people who don’t, especially at play parties. Why don’t you just try it out and see what works for you? 🙂
And of course plenty of people who enjoy impact play or bondage are not submissive at all. If anyone tells you the opposite or expects you to submit just because you’d like to bottom in a scene, chances are they’re a manipulative asshole (or very uninformed & prejudiced).