I love dogs, but aren't there bigger issues in this world that we should focus on first? Millions of children on this planet are malnourished or suffering because of wars, climate change or just bad government. Is it ethical to pay a fortune for magnetic brain stimulation of your dog, if somewhere else in the world several people's lives could be saved with that money?
Unless you've optimized your life by going into the highest-paying career you can and giving virtually all of your money (minus the bare minimum you need to survive) to help those in need, I don't think this is a reasonable argument to be making.