Both practical/survivable faster than light travel and time travel are common tropes in sci-fi. Last I checked, it is not a widely held position that either of these is actually possible.
I'm following, but when it comes to "widely held position" I should remind you that along those lines it's a widely held position that an invisible superbeing created all this stuff. I don't enjoy discussing "what most people think", it depresses me.
I mean, that's kind of the gist of my post.
2. Trope in sci-fi ≠ widely held position
Both practical/survivable faster than light travel and time travel are common tropes in sci-fi. Last I checked, it is not a widely held position that either of these is actually possible.