In general they just use a shitload of energy so prices go up for everyone and produce very little jobs. The worst part is that they don't generate any taxes for locals or Finland in general from services produced by datacenters there, which is very different from other industries.
They pay for the energy they use, which leads to the energy infrastructure scaling up, which generally reduces per unit electricity costs. They also fund, either directly or indirectly through their taxes, upgrades to transmission lines, which also improves the energy infrastructure.
They don't create many permanent jobs on site, it's true, but they also don't consume many government services. So of all the industries, they produce the highest fiscal surplus for local governments. It's a net benefit to the community.
What surplus? They basically only pay property taxes and for services they buy like electricity, like any other company does. But taxes for services they produce go to Ireland. A local industry would have loads of employees and also pay much more taxes that benefits the community.
The community benefit is nowhere close and I'm not sure why you're trying to pretend it is.
