Why does a creator/provider get to do what they want with ads, but no one else does? Who invented that rule? No one did. Those ads weren't there before, then they were introduced. People didn't like them at first but they gradually got used to them. Now every Youtube video starts with one or two pre-roll ads and this is acceptable. Youtube is now even interrupting the videos to show ads. Eventually people will get used to that and it will become acceptable.I think most people understand that a content creator/provider (Amazon, YouTube) has the right to do what they want. TiVo is simply a transmission medium/recorder, so inserting ads seems offensive to some. If someone takes a picture and shares it, they can watermark it. If Apple started watermarking pictures you take on an iPhone, you would be offended.
In reality, technology is the only thing that limits where ads can be placed (with the exception of tobacco). Rovi/Tivo showed ads since day one in 1999, first non-targeted on the home screen because that's all they could do. Then they put them on the pause bar, then in between channels in the guide, etc. Now they have the ability to put them where others have and people act surprised and like it's a sign of the Apocalypse.
Finally, my Moto G6 does occasionally show me notifications about other Moto products. Actually that phone is an Amazon phone so they show me ads too. Samsung phones show pop-up ads too. So this imaginary line that products can't insert their own ads has already been crossed by others.