Government can centralize the cost of nuclear. All goes to 1 contractor who builds it. With solar, every house is a different size so each house will have a different cost. Pretty hard political sell to tell your voters you are going to give more to the rich because they have bigger houses. Totally makes sense from a "well they use and pay for more power" perspective but a really hard sell politically. Plus renters get nothing.
Indeed rooftop solar is something that rich people benefit from the most: it's a fun gimmick that people who own houses can use to dodge taxes and network fees. The most cost effective solar deployments are larger industrial setups due to the economics of scale. From a national economy point of view, rooftop solar makes less sense. Someone still needs to pay for the network after all, it just gets onto someone else's shoulders.
The direction where market must go on that is clear. Higher standing charges for grid connection, more variable market rates. And maybe also more variable transfer rates. Meaning that roof top solar will get less economical as true costs will shift to times when energy is pulled from the grid. Home batteries will shift some of this, but if you want power after they are dark and everyone else want it too it will be expensive.
