You can torrent fine without port forwarding, but having port forwarding is helpful for seeding (which everyone who can safely do it (i.e. everyone who can afford a decent VPN) should do; it’s good etiquette and keeps torrents alive). Without port forwarding you can only seed to people who do have port forwarding, whereas with port forwarding you can seed to everyone.
You can torrent fine without port forwarding, but having port forwarding is helpful for seeding (which everyone who can safely do it (i.e. everyone who can afford a decent VPN) should do; it’s good etiquette and keeps torrents alive). Without port forwarding you can only seed to people who do have port forwarding, whereas with port forwarding you can seed to everyone.
Ohhhhh! Okay, I must have missed that!