It happened in NV.
The electric utility has to pay the individual homeowner solar electric producer based on the NET METERING agreement with the state. This agreement can be changed by the state Public Utilities Commission. The utility got the three person PUC of NV to change the Net Metering rate they had to pay.
The people of NV that had installed residential solar arrays based on their payback from the net metering flipped out. They organized and protested at the capital/governors. The PUC changed it back.
The point is that utilities are in the business to make money. If too many people add rooftop solar, the utility will eventually get the government to change the net metering rate they pay.
FYI, I considered building an array at my residence in NH.
The NH net metering rate is locked in through 2040. This is something anyone buying an array should check.
It is not quite as simple.
Utilities balance their load based on demand. If there are a bunch of little generators dumping into their grid that they can’t control, it causes all sorts of havoc.
Locally, the big generator tried to ban private solar cells for awhile for that reason. Over loading a grid is as dangerous as underloading it.
But as you pointed out, they are in it to make money.