Because the US is full of infrastructure that is critical but weak, and the JIT supply chain stretched to the thinnest of margins in the name of sacred profit can often be the best point of attack.

Remember when Helene ravaged the southeastern US? One of the things that got cut off was a plant producing saline -- turns out, the US gets its saline from three manufacturers, when one went dark, the effects were felt nation-wide. Effects like cancelling surgical procedures for the lack of basic resources, and saline shortages lasting until today.

It would make a lot of sense for foreign adversaries to scope out these weak points, and integrate them into their strategies.