And nearly every living person on earth has been profiting from rent-seeking from the second they are born into a world with food, medicine, water, maths and science, etc that has been created and improved-upon by people long-dead now.
If all people benefit from something then it's hard to find a problem with it. That's presumably not the case for someone who is a high level producer comparing a UBI world to a non-UBI world and seeing only an outflow.