This is not the full story.
You are missing a piece of the puzzle.
The court in Greece (yes Greece, renowned for legality, justice, and truth prevailing in all sections of their society) jailed 3 hotel staff, and cleared two Thomas Cook holiday reps. This was five years ago.
The Jury in the UK this week said Thomas Cook had been in breach of their duty of care to the family. The CEO of Thomas Cook refused to answer questions at the inquest, choosing his right to silence instead, and the company didn't issue an apology to the family for the deaths of their children, and they themselves being in comas and barely surviving, until after the coroner ruled against them.
Personally I will plan to avoid the use of Thomas Cook for the rest of my life now. I wouldn't know if the heating source in a hotel I stay in is effective, defective or dangerous. On a vacation that isn't what I am going to spend my time checking, I would assume the company who places me there would do this for me. Thomas Cook didn't and didn't apologise for it when it killed two children.
When a CEO fails to speak on the matter, refuses to discuss it, and doesn't apologise for it, then it do not reassure me in any fashion. They become untrustworthy in my estimation, and thus I shall avoid any dealings with them.
I would hate to be those parents. They are left with a life sentence, and all because they brought their children on holiday to Greece. The compensation, no matter what amount will be of little solace to them.