I somewhat agree with you, then I heard something that will give some perspective. Notre Dame is visited by about 12 Millions people per year, and the access i

I somewhat agree with you, then I heard something that will give some perspective. Notre Dame is visited by about 12 Millions people per year, and the access is free (at least to visit the ground floor I think there is a fee to get up in the towers). And this is because the Church refuses to make people pay to access a place of worship, that should be open to all. If you compare to other places like the Eiffel Tower, or Versailles, you pay a fee likely around €20-30 to enter. So obviously, these places can afford more easily to be properly maintained or secured. As far as I know the Eiffel tower employs 700 people. So, yes, rationally, you are right that Notre Dame could have been better maintained or watched, on the other hand the Church is voluntarily ignoring a few tens of millions of revenue every year, because of its ideology. Sometimes things are not efficient as they could because other considerations are taken into account.