Since science is both observation and experiment it is difficult to argue with your point.
However theory must be based on experiment. Some observation is very similar to experiment but there is a distinction between the confirmation of experiment through observation and the establishment of theory through observation.
One does not 'confirm experiment through observation'. Experiments are *one* type of observation. Specifically, they are observations where the conditions are under our control to some extent.
We all see what we expect whether what we expect is derived from the interpretation of experiment or through blind faith.
And that is clearly false in general. There have been many cases where the observation was distinctly surprising and not at all what we expected.
is there an effect? Yes. Is it universal and all pervading? No.
No expert can just observe anything and invent theory but this is the way a great deal of "science" is done now days. There is no science in predicting the genome of long extinct simple species. Such predictions are merely going to reflect whatever we believe rather than theory or observation.
Observation and experiment are not the same thing even though there is some "overlap". But no theory can be based on anything except experiment.
Clearly false. For example, most theories of cosmology, or stellar evolution, or galactic organization, (and many others) are based purely off of observation. They are still testable and therefore are scientific theories.
The "theory" of evolution has no support for its conclusions based on Darwin's belief that populations are stable even over the long term. According to Darwin's thinking when populations went down its food supply would go up resulting in an increase in population. He was wrong and he was wrong about abiogenesis because he was unaware of consciousness.
First, I very much doubt that Darwin was unaware of the phenomenon of consciousness.
Second, what does that have to do with evolution? Nothing that is supported by any evidence.
Darwin was what he ate and his conclusions were founded on his assumptions. This is just the way it is for "homo omnisciencis". Abiogenesis is most probably quite rare in the cosmos and probably because of contamination from space.
Huh? If it is from contamination, it isn't abiogenesis. And whether abiogenesis is rare or common is simply not known.
As to the dearth of visible life it's because it's so far away, perhaps faster than light travel is impossible, and anyone who has come chose to remain hidden. Other than to colonize or restock there might be very little reason for any species to visit earth.
There is probably very little reason for interstellar space travel at all. The economics are against it.