What do you gain by being provocative in making the declaration before you even have an administration? Some extra kudos on the Internet?
They're going to do whatever minimal due diligence is necessary. They've got all kinds of security issues to look at, Trump loyalists to weed out and/or isolate, actual sensible chains of command and advice to re-impliment between agencies, etc. Shit, maybe they determine it's useful to leak him selective info and see where it goes.
Save your anger for something substantive, or if they ultimately decide he should continue getting briefings.
For clarity, I'm not even American, BTW. I have no anger in this, but more shock, appall and confusion on why eliminating a physical manifestion of absolute risk would require further delay, especially after the atrocity that said risk has casually caused on a whim. You cannot play politely with Trump, his base, or the GOP, knowing they will never do the same. You stamp it, burn it, at the most efficient pace.
One of my concerns with Biden is that while he will be night and day compared to the default horrible evil of Trump, he is likely more of a return to status quo(which given the consistent decline of American society before Trump just escalated it by a couple decades, is not something to be proud of by any means) President. But time will tell.