For profit isn’t inherently a bad thing, but the more essential the service should warrant more and more regulations on safety security and pricing. They should not be given unlimited control over these.
Government agencies are more than capable of providing equally shitty service even without a profit motive, see: DMV. Any monopoly is. This is partially why regarding universal healthcare most people aren’t advocating for government owned healthcare facilities, but the government being the single payer to privately run facilities to control prices.