And what does "economic impact" means? A bunch of people burning jet fuel to get there and spend some hours looking at it? Why not working towards helping other people?
A week-long golf tournament in my town brings in 200k+ people and local government touts a $190M economic impact number for that. I'm sure it's fudged to be as high as possible, but pretending Notre Dame doesn't have an economic benefit to Paris would be odd.
That seems entirely up to you.
We can do both. Man does not live by bread alone. Utilitarian mediocrity is satisfied with a full stomach and keeping warm.