You're car will probably be worth less.
To each their own, if someone wants to waste 3k+ on wheels / tires, that's on them, why do you care?
What if someone said the music you listen to is F'ing Retarted?
You would hate the JDM world, where these people spend 4k+ On 17" wheels.
My new wheels/tires will run me around $1200.. although, I was looking into a sick set of wheels for 2k, also 17's.