The article sort of reads as a list of individual incidents but I'm not sure it's able to present itself as a particularly alarming trend.
Yes, the Mona Lisa is the most popular painting in the world. Maybe the Louvre needs to expand or build a new space for it that can accommodate more people. Maybe ticket sales should be more limited and sell out after a certain point, with a set number of visitors allowed per day/hour/etc. It sounds like mismanagement (hence the workers walkout) than the tourists being at fault.
Yes, people are dying taking stupid selfies, but not really all that many of them, either.
Yes, some landmarks are being damaged, but also, governments completely have the power to enforce their laws and limit admission, and hand out tickets for littering and vandalism.