Civil engineering and power equipment companies also profit from other plants. In fact, there are specialized power companies for wind and solar. Can't speak for all countries, but lobbying for green energy in the USA, according to PACs, is higher than nuclear. I don't think Switzerland is different.

If energy companies won't invest, then either don't invest public funding, or invest but with focus on developing long-term technologies. After all, the primary reason for nuclear being uneconomic today is lack of investment. If solar and wind can be made profitable, I don't see how nuclear is any different.

Still, the positive note of this is the ban lift, not whether new reactor will actually be built.