Let's assume that Alex Collier made up the whole of his Andromedan contact story for profit, which is very unlikely since he is not selling anything to make money off of it. On top of that, I think there is a limit of a capacity of a person's creativity or imagination to make up a consistent and coherent stories. He/she can always forget what story he or she has made up, so the later story doesn't match with the original one. And as you let them talk over and over again repeatedly, you will see the line of the story gradually changes because the story teller thinks the updated story makes more sense than the older one and so forth.
In the end, no one will pay attention to whatever the story is being told because the story simply doesn't hold any water.
However, if you listen to what Alex Collier says, you will find the opposite happens. The story has a whole grandeur picture in it that makes sense even more after you think it over. And you come to the conclusion that this story could not possibly have been conjured up in a person's mind. Still the important point to note is that this alleged galactic history is still a view point of the Andromedans, which could be biased by some unknown reasons for their own benefit or for self grandiosity, to impress humans for the advantage in their favor.
But then there is another story by Pleidian contactee Billy Meier from Switzerland. His reputation has grown gradually recently because of his consistent predictions that have come true.
Let's assume that 90% of their story is not worth paying attention to. However, the underlying theme, which is not mentioned or emphasized by them too much, is that we are not alone in the universe. At least this message is the same in both cases. It is interesting to note though that both of the contactees try to emphasize their line of story is more authentic.
So whoever wrote the galactic history, it is still their partial view and can not be the whole story of the universe, and like in human society, you can not avoid the fact that the story teller has a tremendous potential to bias the point of view without knowing it or in some cases intentionally distort the fact for their "potential" advantage.
It is interesting to note that according to Alex Collier's translation, Andromedans think humans are royalties. Humans have certain characteristics that make them more noble than other galactic species according to Alex Collier due to many genetic engineering done to humans by the 22 different galactic civilization.
Let's assume that 90% of what Alex Collier has said was all in his imagination which is not very likely.
Still, one thing is certain, that is, at least humans are not ants compared to the vastly advanced civilizations in the universe even from the point of view of the advanced beings themselves.
A few of the memorable phrases in his contact story is when the Andromedan asked him, "I don't understand, why do you have to pay in the planet you are born into?" which hit him hard and made him to ponder over it over and over again. You have to realize that there are millions of anecdote hidden behind this question of theirs.
Another one is the story that they spend 150-200 earth years to educate their kids every knowledge they acquired up to that point of time in their planet, out of 2200- 2800 average earth years of their life span. They do not dumb down their kids and their kids are always more intelligent than their parents and this is considered an absolute necessity for the progress of their civilization, which makes absolutely perfect sense.
Even if we believe 90 percent of his story is a bogus, which is not very likely, we can get abundant hints on where our civilization have to go toward and probably that's the reason these advanced beings are trying to communicate with us.
Due to the "law of free will" in the Universe, no one civilization can force their knowledge onto others of the lesser fortunate.
However, they might want to drop a few hints here and there like in passing, as if they are trying to say "If you can catch the idea from these comments and learn from it, then it will be good for your civilization, but if not, there is nothing we can do for you".
Theory of Gravitation, Cosmology and a part of general relativity