I actually think it might just be a stray weather balloon. If they considered it a security threat they would've downed it before it reached continental US. Overall it's a fair resolution. It's a good political move to raise public awareness of tensions with the PRC (you'd be surprised how many people don't know). Downing it is mostly symbollic and completes the safety narrative.
It would have been hilarious if those turned out to be ADS-B receivers launched by plane tracking enthusiasts but AFAIK it's confirmed that those are with Chinese origin and I find it unlikely being benign because in that case the Chinese would have informed the US about these unlike they seek escalation. I also find it fascinating that these balloons were not discovered sooner, reminds me of the stray soviet era mil…
Revealing that you've noticed tells the enemy about your surveillance abilities.