Based on the Iran war situation I don't think we should be building more datacentres for security. They are easy targets. We should be concentrating on resilience and that means distributing capacity and capability where possible.
For distributing having more data centers seems like a prerequisit to me.
One can argue about size etc, though.
You could have written exactly same thing about refineries - from Russian perspective the bigger refinery the bigger target for Ukrainians.
You’re describing having a bunch of data centers in different location and enough redundancy. What makes you against data centers themselves? They are just a way to pool resources to benefit from economy of scale. They don’t have to be enormous