I think that's one use case when having solar panels on your roof, this way you can also help make the grid even more distributed and resilient by having your own storage. Sometimes you might not even need the solar you can just take very cheap electricity from the grid during the day and sell it back in the evening or use it in the evening yourself

One of those cases where selfishness actually benefits others, just don't disconnect from the grid, that's a dick move if you have neighbors