I disagree with DHS too, but at this point INS and a whole bunch of other stuff kinda either merged in or cohabitated it to the point that I'm not really sure what DHS role is.
Regardless this is 4d chess. Everybody knows Trump doesn't like most the 3-letter agencies for reasons other than far-right idealism. He has been preaching to his base that they are politicized and engaged in a witch hunt against him, and they soaked it in like R. Kelly's sheets.
So, what happens? Biden can't call out this part of P2025 individually because it'll fuel the flames of Trump's base and backfire against him.
Trump has a very obedient, angry mob behind him. Nearly every part of P2025 is something that if Biden were to call it out individually, it'd pour gas on Trump's dumpster fire of a campaign.
The reason is because Trump and the Republican party has no problem, essentially, punching below the belt. Dems have enough tact and honor left to still not be bending the rules or start punching down now. Good on them, but it is kind of a shame, because it's a losing strategy. It's like a nerd wearing a protective cup because he knows the bully is going to kick him in the nuts again, and that's the best strategy they can come up with.