Okay, we'll never be able to customize the Flex home screen. Why?

I see requests to customize the Flex home screen going back at least a year now on these forums, and the stock response is always "Wow, that's great feedback, at this time we have no plans to allow this but have you tried the voice commands?" It's clear they're not going to allow this — honestly, the fact that this wasn't built in from the beginning is all the proof needed to know they don't want to provide this ability. Every other streaming device has this. Every smart TV has this. It's not like it didn't occur to the folks building the Flex that people might want this. So what's the reasoning here? Does Comcast get paid by the different subscription services to feature on the home screen? Is this why the Flex device itself is free? I'd like to know the actual reason. There seems to be no point in submitting feedback about it. Right? After more than a year of that feedback, there are still "no plans" to work on it.