Ostensibly yes, but what do you actually expect to happen if a judge orders the marshalls to take leadership at the DoJ into custody? The mission of the Marshall service may be to provide enforcement to the Judiciary, but they are part of the DoJ and the executive.
The reason these judges won’t do that is because they know that the authority they wield is only possible with the cooperation of the executive. They don’t want to shatter the illusion that they are a co-equal branch because they fear that once that cat is out of the bag they won’t be able to coax it back in.
I agree that they could, and should, try. I just think that the reason they don’t is because they know that it would be unsuccessful.