I wasn't aware this reality check was needed, but it's worth noting that we haven't even left Earth yet (going to the Moon doesn't really count, and we've since lost that capability again). If we were a solar-system-wide civilization, I can see how it would make sense to talk about the feasibilities of interstellar travel, but today we are so far off it's not even an issue. We also don't have any ambitions to change that, so extrapolating from today's state of affairs, we'll probably remain thoroughly Earth-bound until we reach a tech level that enables individual people to have space programs (if we ever get there).

It's fun to think of probe-based exploration, but apart from acceleration/energy based problems we haven't even figured out how to make machines last that long. This is all very, very far off.