This is most likely just rhetoric. Currently half the gas supply of the EU comes via LNG shipments and transport via pipeline is just cheaper. At the same time the EU clearly has the LNG infrastructure to replace Russian gas in place at that point. Not to mention wanting to reduce fossil fuels like gas anyway. At the same time volumes will be much lower, as the EU has signed long term gas contracts with other countries. So this would not lead to a dependence unless something goes horribly wrong. At the same time it is a good way to funnel reparations to Ukraine. Like the EU buys gas from Russia. Russia gets a share which basically covers production cost and the rest is handed directly to Ukraine.