The folks here are mostly computer people, so we look at that and say "I could do that myself in 15 minutes!", but most people can't. Struggling with the potential wireless and firewall issues, TV format, resolution, audio formats, etc... can be frustrating and time consuming for lots of people.
Have you ever paid a plumber to replace a hot water heater or fix a burst pipe? The plumber goes home and thinks to himself "Man, I can't believe these people pay me $300 to replace a hot water heater! That's easy work!" when most people here don't have the tools or know-how to do it.