A data centre consuming natural gas power generation through a new build power purchase agreement is consumption of natural gas. Little difference to building a pipeline for export, except the 'export' is within Alberta. Natural gas consumption within Alberta that doesn't compete for takeaway capacity is a huge net positive. Think of it as akin to being able to build an LNG plant within the province, where the value add is the 'data centre spread' whereas the LNG project value add is the freeze spread. Employment isn't the only benefit to look at, as LNG has relatively little long term employment too, but we still want to do that.
Even more, think about a South Korean data company. Either they can import LNG to run a data centre in Korea, or they can import the data centre services, and save a lot of money compared to their base case, while Alberta makes more money.