It's not an "excuse" for anything. I love my partners, and I get along very well with my partners' other partners. I don't just go around having casual sex, there is a lot of communication and we carefully establish expectations and what we want from each other. I always felt like I had enough love in my heart to give it to multiple people, and I've found being in a polycule to be very fulfilling. I'm sorry you feel the need to degrade that just because it isn't the norm
Because I love multiple people? Personally I feel like a winner, I have three absolutely wonderful girlfriends and I adore them all so much, and I love spending time with them and their other girlfriends and boyfriends, I have the whole polycule over and cook for everyone a couple times a month. It's lovely