YYY Alice and pregnant
I can see how this happened - if you look at the original gentle parenting (or unnamed but alternative-to-reward-and-punishment methods) materials you find that they are aimed at parents who find themselves too harsh or feel they are trying to control their children too much or the control they are attempting to impose doesn't work (generally because of special needs or trauma). So much of the written information is about how to control less, how to back off, how to give the child back control, and it works pretty well in that context.
Apparently if you look at parents in general, most of us will lean either a bit too strict/controlling or a bit too permissive/pushover when we are under stress, and it goes about 90% towards too strict and 10% towards too permissive.
Then gentle parenting approaches became mainstream. The 10% (or whatever) of us who tend to lean a bit too permissive saw all of this "stop shouting/arguing with your child" "have fewer battles" "have a harmonious home without punishment" and we go OMG, really? I don't have to do those things? We go, we consume the information. Here starts the problem.
If you already have lax boundaries you do not need to back off more and give your child more control. In fact you need advice on how to do the opposite, you need more permission to set boundaries for reasons that feel arbitrary or unfair to you. The problem is that the vast majority of gentle parenting resources don't have this information because the assumption is that you're starting out with too many and too tight boundaries and you need to loosen them and lighten up a bit. So you end up in a quandary because you're trying all the gentle parenting techniques and some of them work, but you also find yourself completely losing it and being very ungentle (or just incredibly stressed) regularly, and then you feel embarrassed to ask for help because you think that you losing it is the problem and you just need to do gentle parenting better and it will get better, but you can't and you end up in a vicious cycle. (Actually if you're losing it a lot, it's just a sign you just need to have more boundaries and tighter boundaries. You can continue to do gentle parenting, it works absolutely fine.)
It's taken decades but there are finally some resources out there now that combine boundary setting with a non-punitive approach, although they are still really hard to find. The problem I always found was that every resource about how to set boundaries is based on an idea that boundaries are enforced with a clear structure of warnings and punishment, and that always made me feel conflicted because I had read so much (that I agreed with) about how punishment isn't the most effective way to teach things and can be harmful. So I never really stuck with it long enough to understand the helpful parts which are that boundaries are enforced with communication (which may include but is not necessarily warning of dire consequences!) and action (which could be punitive or might not be) and about where and when it's useful to draw one. Just that small difference and it clicked for me.