Not liking this... House arrest isn't something I'd have liked to have seen, and I don't think I'm alone with that opinion. Hence the "Controversial" on your part.
I think Picard was boxed in. He threatened to resign and Starfleet called his bluff. He had to fold or Starfleet Command would never his protests seriously again. They'd think he'd whatever they say no matter what.
Maybe it’s because I had Search For Spock on in the background while I was working today. But I think it could have been Picard's “the answer is no, therefore I am going anyway” moment like before Kirk stole the Enterprise.
Maybe house arrest is a bit tough (although, c’mon before Dahj/Soji did he ever leave La Barre) but maybe Starfleet gently encourages him not to leave Earth or something like that. Like an un-official house arrest. I mean, in this idea he basically forges orders to get ships to follow him in the rescue attempt.