Rate of return issue, and how the current bond market activity and yield curve plays into this, is covered in https://www.thebignewsletter.com/p/how-the-federal-reserve-s...
As interest rates go up, investor owned utilities increase their rate of return on equity ask, pushing up consumer electricity prices. A baseline of consumer electric demand is inelastic, and required for life.
It's hard to find any sector not impacted deeply by the price of money (US10Y).
But yeah, natural monopolies with inelastic demand (power, water, healthcare, shared infrastructure) should be publicly owned, imo.