i think you miss interpreted, they are poorly defended because they are civilian, meaning globally data centers are universally undefended from military action. meaning this sort of action can spiral out of control very fast. and would have major global economic adverse effects.

its also important to understand that government isnt non civilian, in this context its non military

Direct attacks on civilian infrastructure can be war crimes. Data centers that host military workloads are not civilian targets.

I didn't misinterpret, you are using incorrect terminology.