there is a loki that didn't pick it up.
loki A (didn't pick up) and loki B (picked up)
loki A is pruned (well taken to the TVA)
loki B is not pruned.
the existence of loki B is why loki A cannot go back to that timeline - as there was already a loki living his life (well until thanos killed him).
how can agency be removed when
both things happened?
"That’s what his agency leads him to. Always." shows that you do not understand how this works .
in the "original" Avengers 2012 the "endgame avengers" were (always) running around in the background, we just didn't see them. those events (including NOT picking up the tesseract) are in the past of the Loki who got imprisoned in Asgard, who was in Ragnarok and who got killed by Thanos.
if you stopped and asked the Loki in Ragnarok or Endgame why he didn't pick up the Tesseract in Avengers 2012 tower after he lost the chitauri battle he would know about it and would explain why because it is part of
his past.
-
also finally you are taking the TVA messaging as dogma.
the threat of the other loki/mystery person shows that it is possible to maintain alternative timelines (and hence actions).
-
also it is not predestination. it is pre-knowledge of what "happens" happens
all the time (as morbius put it) i.e. what is happening right now at every "now" instance (from the TVA/time agnostic pov). "all the time" because the TVA stand outside of time (our time-flow).
don't think 10th dimensionally brehs
and as usual brehs avoid learning but keep talking. watch the videos.
-
many worlds
-
and ...
clearly there are pan-time beings who can mess with the flow of events in exotic ways. Kang being one example. The mysterious figure messing with the TVA potentially being another. so that factor will be thrown into the mix later.