To offer an answer to your question about why the US is pushing so hard on disclosing details of the balloon to the public and to allies, this is a rare opportunity to counter Beijing's dissembling by showing hard evidence rather than ending up in the usual unproductive counter-trading of allegations and party lines. The Biden administration is having to work doubly hard to convince allies who are being subjected to Beijing's charm offensive to stay aligned with the US view of China and the sanctions and restrictions it is imposing on Chinese entities, so the downed balloon is a gift in that regard.