When RJR Nabisco was going through the 1988 LBO, they chose Henry Kravis' final deal over Ross Johnson's, despite Johnson's offering a higher price. RJR Nabisco was public at the time, so a public company CAN choose a lower deal if it so chooses. In fact, the original Time Warner deal, before Paramount Communications bid for Time, made a lot more sense, as a merger of equals. Time easily could've told Paramount "We're not reopening the bidding, this deal with Warner makes sense. Get lost."21CF was a public company, Murdoch could not just tell Comcast to "get stuffed" as they had a fiduciary responsibility to get the most value for the company they can. If they just told Comcast to go away there would have been a shareholder lawsuit for not fulfilling their fiduciary duties, SEC takes that stuff very seriously.
Maker Studio was different as it was a private entity with only a handful of investors that had to be made whole.
The debt being discussed is the long term debt that was accrued during the 21CF acquisition as well as the pandemic bridge financing they took on. And while its going down slowly investors having been pushing to have it paid down faster hence the push to sell assets like ABC and other legacy linear assets.
As for whether Disney will or won't sell their US linear assets, as was discuss whether its the Allen deal or someone else Disney will eventually sell them. As legacy linear while you feel is a companion to streaming is a dying media and as such Disney will be getting out of that distribution model whether now or in the near future. Basically don't look for Disney to have those assets 5+ years from now, likely less.
The overseas linear TV assets alone would achieve much of what you claim selling the US assets would. The Europe, Asia and India assets together can net $20 billion.