Is it though? Maybe the construction itself but after that running a data center doesn't need that many on-premise people, like it can be in the two digit range which is not a lot at all. And even then on-premise people won't be the highest paid engineer jobs but rather security and technicians.
Nebius is currently building a 310 MW data center in Lappeenranta. The construction phase employs ~700 people, and the finished data center is expected to have ~100 employees.
Understand that if the data center developers had not been so cartoonishly exploitative in their deal making in these municipalities nationwide, there really wouldn't be that much pushback. NIMBY stuff ultimately gets built all the time, usually because the money offered is just too good. Instead of using their massive amounts of capital, they struck backroom deals with local politicians to get tax credits, pass along infrastructure costs to other parties, and otherwise financially burden the community.
They had the money to go in and do all of this stuff without involving the public beyond the usual permitting processes; they just thought themselves too important to be burdened with having to spend money to make money. It's the "cult of the founder" mindset in action at the infrastructure policy level.
Data centers simply don't require very many people to operate.
During normal operations though, you would have a handful of technicians, probably a facilities manager and frequent contractor visits, probably onsite security.
The facilities contractors may come from far away for maintenance projects, so maybe you help support local hospitality businesses.
Most of the highly paid work at the datacenter will happen remotely.
Every so often, there will be a hardware refresh, but you probably bring in people from elsewhere to do those, if it doesn't make sense to have the onsite techs do it little by little.
Certainly, there's a lot of equipment installed, and any locality with property tax on business equipment should get value from that. But otherwise, almost any other light industrial business would have more employees.