Its my way of thinking. From the ip perspective I can see peoples argument about profits and companies but for individuals you are likely to get your stuff stolen and used by companies. I mean look at ai training. So better to deny any company trying to claim your work is thiers. Added to that is the company technology that goes to the graveyard. Open source allows ones work to be immortal. Then from the user perspective we all know how controlling and privacy invasive proprietary software is.