Source: MPR News - Link
The policy has been dormant for more than a year and the administration argued that abruptly reinstating it “would prejudice the United States’ relations with vital regional partners, severely disrupt its operations at the southern border, and threaten to create a diplomatic and humanitarian crisis.”
The Trump administration largely stopped using the “Remain in Mexico” policy at the start of the pandemic, at which point it began turning back virtually everyone crossing the Southwest border under a different protocol — a public health order that remains in effect.
The gist of the article is not that the policy is good, it is that the administration did not provide enough rationale for ending the program. It was also noted that the Trump administration suspended the program prior to the Biden administration, using a different program to exclude all migrants due to the pandemic, regardless of health status.
Denying asylum is against US law.