"I chose X so to validate my choice I will tell you why Z is the worst!" It happens everywhere. Some get more caught up in it (Video Game console, iPhone / Gal

"I chose X so to validate my choice I will tell you why Z is the worst!" It happens everywhere. Some get more caught up in it (Video Game console, iPhone / Galaxy, etc.). Marketing tries to play into this a bit for free promotion. Make you feel intelligent for choosing them and you're part of a club so you'll spread their gospel.