They dont want to disconnect Russia completely. I can't find data for all 2022, but between February and August EU countries paid to Russia around $100 billions for energy resources only: gas, oil, etc. Here is the data till November so it's far more than just $100B:

https://www.bruegel.org/dataset/russian-foreign-trade-tracke...

It's still more money than US and EU countries spent combined on help to Ukraine:

https://www.ifw-kiel.de/topics/war-against-ukraine/ukraine-s...

It never mattered.

https://alhambrapartners.com/2022/02/28/swift-isnt-the-nucle...

Because there are still commercial exchanges between the West and Russia.