Your point on time and relativity is a good one. But that should not be called time travel. People colloquially use "time travel" to denote an event that breaks causality. You are probably thinking about nonlocality and entanglement. Those do not transfer information or material in a superluminal manner.

I appreciate your distinction between hypothesis and theory. For at least the sake of our current societal ills, a hypothesis should not be taken as a truth until it becomes a scientifically accepted theory.