1. Consistent stable long-term energy 2. Controlled by Finland, to minimize all kinds of risks (war foreign influence, cut sea cables, worsening of relationships with other countries, market conditions and economic situation changing.
So what did Finnish politicians decided to do? To cancel the project for nonsense political reasons (let's see how much Finland will be forced to pay in damages), therefore INCREASING the reliance on foreign sources or unstable local sources.
This is the stupidity on the level of "Germany decided to run down all the nuclear powers for the sake of environment". With disastrous results!
"We don't want to allow Russians to build anything" is a statement full of feelings, but not a lot of sense, if one thinks even a little bit deeper.
Finnish oldest Loviisa nuclear station is Soviet based and this has not caused any problems. The nuclear fuel is also being provided by Russia, despite the war.