That's a bit of a dumb argument though. It's like visiting America and spending your week entirely in Detroit. If you leave convinced that Americans are all agressive, violent niggers, you're reducing the entirety of the culture and country to the shittiest part you've seen there's jews too
add to that the fact that Paris is one of the most visited cities on earth by tourists; that tourists, well, tend to get together in the same places and so see more tourists than "real" french people; and, also, are constantly harassed by tourist-salesmen, especially poor immigrants who can't bother to have a real job, who want to sell their shitty stuff to dumb tourists… in short, if you're a tourist for a short while only, you're infinitely less likely to encounter "real" France (just like any other country).
That's always the case, almost everywhere (places like India are shitty everywhere), and that's why tourists need to avoid tourists' routes at all costs, because they won't get to see the country, they'll see what the country gives foreigners, either through indifference, greed or arrogance. Obviously there are exceptions, but Parisians are known to hate tourists because of how many there are in their town. Heck, ask any frog, and they'll tell you they mostly hate people like Americans or Italians because they don't even bother to speak a word of french during their entire stay, and expect everyone else to adapt to their own language instead, even when visiting a foreign country. You'd be pissed too.
That's where the Paris syndrome comes from. Tourists who can't be arsed to actually visit "real" places, instead of spending five hours standing up before finally getting into the Louvres.
polite sage for offtopic