Reminder on Stockholm syndrome:
According to accounts by Kristin Enmark (one of the hostages): the police were acting incompetently, with little care for the hostages' safety.
She had criticized the police for pointing guns at the convicts while the hostages were in the line of fire, and she had told news outlets that one of the captors tried to protect the hostages from being caught in the crossfire
but the prime minister [Palme] told her that she would have to content herself with dying at her post rather than Palme giving in to the captors' demands.
Ultimately, Enmark explained she was more afraid of the police, whose attitude seemed to be a much larger, direct threat to her life than the robbers.
Which could possibly be relevant here, particularly the civil war part.
My napkin guess is that this is some sort of specific process/tactic, either it only allows ~~1~~ 2 levels of reclassification at a time or that was all that could be agreed on (with multiple agencies, likely the DEA limiting the pace). So either avoiding the Senate or the tiniest of steps that pretty much anybody will allow/defend. Slow-and-steady could be the plan, assuming Biden wins again and actually follows up.
Well that and it probably really helps with the turning-a-blind-eye, like the difference between ignoring/acquitting a hit-and-run fender-bender versus ignoring/acquitting the act of treating a no-traffic intersection (in clear conditions) like a 4-way stop. Maybe it will be enough to reduce hostility and move the relevant overton window over time while avoiding pushback.
EDIT: Looking at it more, this seems to be the department of HHS pressuring the DEA on clear medical use. As others say, the lower restriction might help further medical study which could in-turn result in further reclassification.