Did any one factory in those industries (paper and high end manufacturing) use 50% of the output of a nuclear power plant?

No, but one company (UPM -- paper mills) consumes 8-9% of all electricity produced in Finland.

And what percentage of finland does UPM employ?

The four planned data centers involved in this deal, after construction, will likely employ less than 1000 people.

Did you read the article? Google has mentioned four distinct locations. That means at least four separate data centers, possibly more.

I can see that I’m not going to convince you there is a scale and centralization difference here, but maybe you can vibe with the economic difference? Paper mills and manufacturing employs a lot of people. Data centers, once they are built, employ very few people.

If Philips Lighting (Signify) or Osram wanted to build new, fully-automated lightbulb plants in Finland, would you also be against those plans? I have seen some YouTube videos that show how modern automated lightbulb plants operate. They require very few workers to operate.