Pick a color wrote...
Kinda ridiculous how Bioware can write something so bad that fans have to comb through every conversation just to try to bail them out. Same goes for people combing through ME1 trying to find some some form of justification for the Crucible or the Catalyst.
With enough headcanon anything is possible
See:
Why didn't harbinger shoot the normandy?
- it wasn't a priority, the people rushing the beam were
- He couldn't see it cause reaper IFF
- he wants to indoctrinate shep
Why did harbinger leave after zapping shep?
- to catch the normandy, he left his servents to gather sheps body
- it was a dream sequence
How did the squadmates get on the normandy (all squadmates)?
- After picking up the injured squaddies, joke made a trip to pick up the rest of your team
Why didn't the catalyst open the citadel in ME1?
- He didn't want to, he is an observer that does not interfere directly, merely 'pulls the strings'
see? headcanon!