Sure, we'll just pack up our glass and steel foundries and oil refineries and move them across the country. Should be cheap and easy.

The world is a lot more complicated than "datacenter bad". I don't think datacenters are a good justification for HVDC transmission. HVDC transmission justifies itself because even if you could magically transport the biggest consumers to where the power is generated, we still need to transport power all the way across the country. HVDC is the most efficient way to do that bar none.

The reality of the situation is that our power grid is a century out of date and needs an overhaul for the realities of renewable energy. Not installing HVDC transmission lines is simply not an option if we want the whole country to stop using local coal and gas plants.