Yes. They cost more than some cables. But we aren’t talking about wiring a stereo.
A new nuclear unit (4 billion-ish) costs about as much as 2,000 miles of transmission-grade cable (about 2 million per mile). Considering that there’s about 30 cables on a tower run, you’re looking at around 65 miles’ worth of cable for the cost of a nuclear unit.
And that’s just the cost of the wire. No towers, no conduit, no substations, no land acquisition (aerial easement and underground are very different things), no labor.
Foreign adversaries already had Trump installed. Why would they need to go through extra work.
Hell - the new Director of Intelligence is a Russian asset.