My family and I 'cut the cord' in 2005, back when Netflix meant DVDs, and other than access to sports, we haven't missed TV at all.
These days we use an Apple TV 4th Gen, with only Netflix, Plex and KPBS apps, and I believe my kids are better off for it. They still have access to way too much TV, but at least we know what they're seeing.
Unlimited streaming has its own problems, because your kids know it's never impossible for them to watch their favorite show, unlike with the bad old days of Saturday morning cartoons and just a handful of OTA TV stations. You can just say no, of course, but it's easier when you don't have to.
Actually, the entire Internet kinda presents the same problem for adults and personal willpower.
The 'problem' with willpower is not temptation. Temptation is only a problem for those with no willpower who paradoxically want to believe that they do. There are two solutions. Either study philosophy and come to understand why you act the way you do and seek to modify that if desired... or actually evaluate the real consequences of your actions and decide if whatever their label might end up being whether the consequences are actually worth being worried or ashamed about. Most often, people are worried about things that harm no one, making their worry absolutely meaningless.
These days we use an Apple TV 4th Gen, with only Netflix, Plex and KPBS apps, and I believe my kids are better off for it. They still have access to way too much TV, but at least we know what they're seeing.