Yes agreed, emperor xi is testing the USA political, military reactions and responses to this balloon. It's an offensive provocation, an attempt for dominance. We (the west) are being mooned at. and being sneered, at for how easily the balloon breached our airspace.
I hope Secretary Blinken CANCELS his trip to China, scheduled for next week. And a USA balloon slowly flies into China.
The only reason not to shoot down the balloon over Montana, is if the Pentagon is concerned that it may have bioweapon agents eg anthrax. That would be dispersed on explosion.
I think that's the real reason for not shooting it down, not the lame debris excuse.
The easy of entry into airspace, the low financial cost of this "adventurism", is alarming though. And no doubt, state, and non state adversarial actors are taking Notes (and acquiring a fleet of balloons with engines)