It’s basically the same deal
It’s not even remotely similar.
Also, that “stinky place” to us is heaven to a plant. Kinda how the foul oxygen they excrete is life-giving air to us.
The stinky place isn’t soil. It’s a sewer or a landfill, because that’s where human waste ends up. Neither can support plant life because they are devoid of light, just like the realm of Cthulhu.
Doesn’t change the plant-animal arrangement from the perspective of the plant, it’s still freely given. We just hold up our end through agriculture.
It’s freely given by a plant just as human sacrifices are freely given by a cult.