Maybe he's actually taking the steps that are required by law to accomplish it??

https://fivethirtyeight.com/features/could-pot-be-decriminalized-before-biden-leaves-office/

(Swipe - full article at the URL provided)

Moving a drug to a different schedule is a lengthy bureaucratic process — previous reviews of pot’s CSA classification took between six and 22 years to complete, Hudak said. But he and other experts think that this reclassification could happen much faster. That’s because Biden is approaching this declassification in a unique — and powerful — way.

That starts with how the president announced his plans. Biden publicly told his appointees that he wants this done “expeditiously,” pressuring his officials to act before his term ends in 2024. “The president is messaging to those appointees — and the appointees will totally understand it — that this is something he wants done ,” Hudak said. In contrast, former President Barack Obama refused to take this administrative action, telling reporters that a schedule change had to come from Congress. Biden not only directed his agencies to conduct this review, but announced it by saying that Schedule I “makes no sense” for pot.

The process will begin with the Food and Drug Administration conducting a scientific evaluation of cannabis. This study will look at eight different aspects of the drug, including the substance’s pharmacological effects, public health risks and potential for abuse. The FDA will send this information to the secretary of Health and Human Services, who will then make a recommendation to the Drug Enforcement Administration. The HHS secretary can recommend that pot remain a Schedule I drug, be moved to a lower, less restrictive schedule or be removed entirely.

Both Attorney General Merrick Garland and Health and Human Services Secretary Xavier Becerra are already taking up the charge. Becerra tweeted hours after Biden’s announcement (at 4:20 p.m., in perhaps a nod to stoner culture) that he was “looking forward” to working with Garland to review how marijuana is scheduled under federal law. And the Department of Justice announced the same day that it is “expeditiously” reviewing pardons and working with HHS to review pot’s scheduling decision.

This forceful move by Biden has made legal experts like Daniel Shortt, a cannabis attorney based in Seattle, optimistic about the chances marijauna could be removed from Schedule I.

“This is the most consequential piece of federal cannabis policy since 1937, when federal pot prohibition began,” Shortt said. “However long this process takes, it’s going to end with a significantly different approach to federal prohibition.”

But there are many ways Biden’s scheduling directive could fail. Chief among them is the evaluation of marijuana’s medical effectiveness. This isn’t the first time the federal government has reviewed pot’s Schedule I status. The DOJ and HHS have studied the issue multiple times and each review has concluded the same way: with the FDA declaring that pot is dangerous and has no accepted medical use, and the DOJ refusing to remove cannabis from Schedule I.