[airborne]

Interstellar travel is shown to be practically impossible, thus eliminating extraterrestrial explanations.

RUFOs exhibit the ability to defy the laws of physics in various ways..."

These two statements seem to contradict one another.

As far as interstellar travel being possible or not, certainly not for us.

But if - "RUFOs exhibit the ability to defy the laws of physics" - as is theorized in your post, then interstellar travel may well be possible.

Off topic, but if aliens do possess the ability of interstellar travel, they certainly possess other incredible "powers".

So them coming here to visit earth would be much like us going to visit a zoo.

We'd be a curiosity. An "alien ant farm" as it were.

[Hebrews 11:6]

Your conclusion does not follow. The points Ross et al made were (1) that practical difficulties prevent interstellar travel, and (2) the fact that RUFOs appear to violate the laws of physics suggest that they are transphysical and thus otherworldly--i.e., from the (fallen) angelic realm. If interstellar travelers could transcend the laws of physics, those would not be laws of physics.