While that's generally true for basic CDN backed services like image fills from akamai, DNS geolocation isn't the norm for more complex applications. Netflix specifically doesn't use dns to push you to a specific pop, you first talk to a set of central authentication/drm servers who in addition to giving you your ticket/key also direct you to the video CDN POP they choose for you. The fact that Apple TV made the news because their service was/is broken by anycast DNS servers is just a case of bad engineering and not the industry norm.