I currently use TinyWall Firewall, it works very well, it’s small/portable, no complaints I even donated to the Dev but I would really prefer open source, also it needs to be user friendly like TinyWall so my non-tech family members can/will use it like they do with TinyWall.
Can’t say I do tbh. You make it sound like if one prefers healthy foods they can’t get a craving for a burger and yet ditch the fries. To me it seems completely normal.