Perhaps "short sighted" would have been a better reaction. I would have expected a more nuanced response.
When it comes to the notion that there's other intelligent life out there somewhere, physicists love to emphasize the sheer vastness of the known universe. Pointing out there's billions, perhaps trillions of galaxies out there and thereby the existence of life somewhere seems quite possible if not likely.
At the same time, physicists are quick to point out the challenges other life forms would encounter when it comes to traveling across the unimaginable between galaxies.
Unimaginable being the key phrase. Saying "aliens" more than likely haven't visited Earth because there's no high def images of them, to me discounts the possibility that other life out there has advanced
far beyond, perhaps millions of years beyond, the relatively short existence of human life here on Earth.
I would think that a better response to the questions about aliens visiting us would be something like, "
not as far we know, but at the same time, what we know is quite limited."
But hey, don't even get me going on about carbon based life forms, Quantum Physics/Entanglement and such...