A corrupt data center official has much easier options to attack bitcoin at the network level. For example, a rogue sysadmin at a major Tier 1 ISP could use BGP hijacking to mount a partitioning attack against the network.

See the paper “Hijacking Bitcoin: Routing Attacks on Cryptocurrencies” [0] for more details on this.

[0] https://btc-hijack.ethz.ch/files/btc_hijack.pdf