Concerning VIolence
Decolonizer
Nobody believed the Reapers existed until they attacked in 3
No ,you're wrong. The Reapers have always been a plausible myth and rumor in the ME universe believed by many peope..
After Soverign's attack it pretty much became a confirmation of people's fears.
The Citadel Council and the government people of several speices were the only ones that stubbornly didn't believe the Reapers existed,
Outwardly at least, because in ME3 you learn the reason the council were unpreprared were because they wanted to uphold stability and delay panic long enough for polical advantage. They were merely pretending they didn't exist to for their own interests.
The asari councilor in ME3 had a Prothean beacon all along that could have prevented a war with the reapers before it even started, but kept it a secret up until Thessia finally got their shyt pushed in.
After Saren's attack, the average being is not shying away from any fact that the Reapers exist. Most of the Systems Alliance believed Shepard. It is only politicians and people in power and those with personal interests that scoff at the idea.
All of you are making the story more complicated than it is.
The Andromeda Initiative is formed by private rich interests by an unknown group of species/people that was formed for the mere matter of exploration because a lot of money can make anything achievable.
Private interests mean there's nothing about "beef" between the governments of species that's going to be a hindrance to anything other than their goals.
Post-Soverign it transforms into a survival program because the galaxy just got their first wake-up call and due to the huge possibility that Soverign isn't only the Reaper out there and that there's going to be more. it becomes a matter of life or extinction.
The Initiative is launched after Shepard's victory against Soverign, after his death, and before the Reapers arrive. That's perfect timing.