They care about the oil/gas industry enough to avoid going nuclear.

https://calgaryherald.com/opinion/columnists/opinion-albertas-ban-on-renewables-carried-heavy-price?taid=66b4cfc7377b7b00016f813a

Since the moratorium announcement, 53 projects have been cancelled. This is more than five times higher than the normal project cancellation rate in the last few years. Calculated very conservatively, these projects represent an annual loss of $91 million per year in tax revenues to communities. This is revenue that would have been stable and sustainable. Wind and sun don’t run out, and when equipment wears out it can simply be replaced.

https://www.cbc.ca/news/canada/calgary/alberta-renewables-pause-moratorium-aeso-foip-1.7196943

The internal documents now show the opposite chain of events: rather than the AESO asking the government for the pause, it was the government that asked the AESO to write a letter in support of the policy.

https://www.cer-rec.gc.ca/en/data-analysis/energy-markets/provincial-territorial-energy-profiles/provincial-territorial-energy-profiles-alberta.html