My mum has a philosophy that when travelling you'll have more enjoyment by visiting the second or third best version of everything. You'll turn up at a tourist attraction and be trampled on by a biblical quantity of people, then turn a corner to the lesser-attraction and it'll be practically desserted.
In Rome, don't go to the Colosseum, go to the Baths of Caracalla.
In Cambodia, go to Angkor Wat for a little while, but spend more time exploring the other temples - because you'll find there are a fraction of the tourists and there are plenty of fabulous temples to explore!
I think in a world of almost 8 billion people some compromise when travelling is necessary and healthy, for the preservation of these locations, but also your own enjoyment.
In Rome, don't go to the Colosseum, go to the Baths of Caracalla.
In Cambodia, go to Angkor Wat for a little while, but spend more time exploring the other temples - because you'll find there are a fraction of the tourists and there are plenty of fabulous temples to explore!
I think in a world of almost 8 billion people some compromise when travelling is necessary and healthy, for the preservation of these locations, but also your own enjoyment.