Congestion charges seem common enough. If that can be applied to cars why not just people?
And places like Venice are rather special exceptions we can accept and live with. It is clear that something should be done for public good, also the now limited number of tourists.
In what other civilized city in the planet is access charged? Disney? Cars in Manhattan? De facto taxes via taxi fare in some cities?
It isn't a huge deal in my opinion, but it is novel.