The parent companies that own the utilities can (and do) gain marketshare, and/or profits. They're diversified so they can get profit from other places. There's

The parent companies that own the utilities can (and do) gain marketshare, and/or profits. They're diversified so they can get profit from other places. There's lots of tricks to use to create profits; get government grants, try to replace old expensive inefficient infrastructure with newer more efficient cheaper stuff, create more infrastructure to service the growing power needs of new power-hungry industries, supply more power to new or growing cities, build out electric vehicle charging, try out new technologies like hydrogen, etc. They are quite expansive operations with a lot of fingers in a lot of pies.