If this is really just about additional featured slots for Youtube TV in the Roku home screen. Apple would never cave to that. Xbox, Amazon, PlayStation, none of these companies would cave and give YouTube special treatment. Roku shouldn't either.
I had read something earlier which suggested there was also an issue with Roku selling devices with processors too underpowered for some new compression algorithm YouTube wanted to use. If this is the case, this feels more reasonable to me, and I'd be less inclined to pass judgement. At the end of the day, this would be Roku trying to save money and move the costs on to Google, which isn't equitable.