I don't know why you are downvoted but I agree with your point that the shooting down feels a bit like an overreaction.

For instance, the Pentagon has just reported that several Chinese balloons have been crossing US airspace in the recent years [1], also during Trump presidency. These were not shut down, they were not even reported at the time AFAIK.

[1] https://www.businessinsider.com/conservatives-blame-biden-ch...