Sorry, Orphalesion, I did not see you had newly posted before I submitted my reply. I get that you feel this is a weakness of Science Fiction. Even so, many genres have a certain presentism. Science Fiction has creative devices that allow presentism to be explored most fully.
No worries. It's just a pet peeve of mine when it comes to Sci Fi and fantasy because it always seems to me like the show runners are saying "We need a break of all this childish space alien nonsense and do something classy/serious for once."
It was, after all still the time when fantasy/sci fi was much more perceived as only for "nerds" and children.
Luckily today fantasy/scifi shows have a higher chance of being taken seriously and I can't really think of a contemporary SciFi show that "broke" it's genre. However "Caprica" was very close to that (from what I have seen)
To be fair Sci. Fi shows are the only ones that can mix genres and remain Sci. Fi.
A regular cop show for example can't introduce stuff like time travel, aliens from outer space...etc without becoming something else.