I think there is gatekeeping of knowledge going on. Scientists make money/living and a reputation from being "experts". So when the paradigm that is kind of their "turf" is open for debate, instead of curiosity and being open minded,. they fiercely defend the status quo under the guise of Occam's razor. It is also a conservative trait that resists ontological shock by forcing "rule based" dogma over chaos/unknown where free thinking and being open to new ideas is cast as dangerous and subversive.
"Pseudoscience" is real, in the sense that there are people who lack the necessary knowledge who make claims that get a lot of attention.
The famous 1989 "Cold Fusion" claims made by two electrochemists are an example. They were real scientists, but the wrong kind for such claims.
Relevant because they were making claims based on measurements that were at the very edge (or just beyond) the accuracy of their measuring equipment.
This is what's happening with 3I/Atlas. We can't "see" it well enough to make most of the wilder claims.
The claims (even Loeb's) would be fun if they were handled better, but that's not what's happening, because the correct conservative approach doesn't get the same level of "clicks and attention".
On the other hand ....
The approach you and
@Judge describe is also real.
I'm very skeptical about Beatriz Villarroel, but also of
some of the criticisms repeated in the Wikipedia article, which IMO are consistent with the comments made by by you and Judge - "knee-jerk" denials based on supposition.
(There were some good criticisms too, and it's even possible the bad ones were misquotes - but the article as it stands includes some questionable stuff).
FWIW, here (from Wikiedia) is why I'm highly skeptical of Villarroel:
At this time, Villarroel—faced with what she characterized as bullying and harassment within the mainstream astronomical community—said that she decided to fully embark on "UFO research" and "destigmatizing the UFO topic".
This approach has caused enormous harm to the "soft sciences" and to society as a whole.