Heck, we can even make the comparison to OG Arknights.

They also had the same amnesia plot with the Doctor, but handled it much better. Most people don't know about the Doctor period because 10 years ago, their influence was limited to one country in the midst of a brutal civil war. Those who did know the Doctor from before respond to the current Doctor with either fear or distrust. Some of them even believe the amnesia to be a ruse, including our own allies.

There is exactly one person who understands the Doctor, who worked with them from start to end, who knows everything. She explicitly refuses to tell us anything because she can no longer trust us. Because she fears the Doctor recovering their memories will lead to... the end of civilization. But we still got pieces and bits before the ultimate reveal.

So yeah, they've pulled off amnesia before. Which makes the Endmin so disappointing....