I'm not touching the first one
I see Big Pet has gotten to you ๐
There's a danger of power accumulating in any system. But there are mitigations. The greatest threat to this fantasy system are barriers to entry. If everyone has their needs met, then there can be a minimum wage of 0. With the minimum wage at 0, I think barriers to entry will drop dramatically and it'll be that much harder to protect "your" market share.
If we get rid of "intellectual property", barriers to entry drop even further. Switching costs can be minimized by open standards. But then we run into the harder questions of the physical barriers to entry (rent, commodities, factories) and regulatory barriers to entry.
With a reasonably low barrier of entry, I hope that there will be enough centers of power that are intrinsically opposed to one another so that they cannot combine and oppress us all.
And for any government, what's to stop them from oppressing us instead? The people always will have some mechanisms of control but every system will have its own difficulties and weaknesses. And the relationship isn't just companies becoming governments, but there are also governments becoming companies. In fact, I'd argue it is more common for governments to become companies than vice versa. Cuba's GAESA is in hotels, while Myanmar's Junta and the IRGC are pretty well diversified.
Honestly, I just dislike other people's dogs. They're off leash, aggressive, and slowly bleeding into every space. Having a neighbor that encouraged anxiety and barking was an exceedingly unpleasant experience.
That being said, I'm uncomfortable with the idea of animals being created for and existing for humans. The situation is definitely better than the livestock industry and there's also the complication that the pets seem to be happy and humans seem to be happier with pets. It would also be exceedingly cruel to take away service dogs from those that have them.
But, pet ownership is rising world wide. Given the demand, they'll be bred. Pet QoL is going up. Now that they're family, their environmental impact is going to grow.
Yes, rescues are better than the alternative. Spaying and neutering reduce harm. I wish that the default pets would instead be cold-blooded terrestrial animals and rodents. I wish pets were unable survive outside of captivity.
I think it's generally immoral to own pets and that if one does, one should strive to maximize the human happiness:externality ratio. It's a minor immorality, but the OP asked for controversial moral opinions.