

The fact that unidentified things exist on this planet is clear.
Them coming from a extra terrestrial source is not in any way clear. Without any evidence of the transfer of life to or from earth. The idea of extra terrestrial origins of any form of earth bound life is still to be questioned.
You say extraterrestrial life is only recently accepted as feasible by scientist. In this you are correct, mainly due to evidence off the number of plannets.
But no seriose scientist has any reason to accept that life has reached earth. First due to 0 evidence of such life having the ability to travel existing within our own solar system. 2nd from the complete lack of evidence of any form of faster then light gravel from other solar systems. Along with no yet existing evidence of life.
It is in no way scientifically feasable to believe any of your experience is extra terrestrial in origin or alive.
It also has had real issues finding funding. And yes many who have worked for it. Have then had real issues finding work outside that field.
So yes by many it has spent a sizable portion of that 65 years seen as not real science. And a waste of money.
Quackery is a term normally saved for medical non science. Not a term I tend to use unless the scientific background is actually false.
Scientists tend to just question the effectiveness and cost of a scientific endever.