When my child began their social transition over two years ago, one of the primary objections of unsupportive "family" members was the possibility of my kid changing their mind. My answer then and my answer now is: so? Dear reader, I could make a list of all the reasons I don't care that my child changed their pronouns. In fact, I think that's exactly what I'll do.
Now, let me be clear and highlight that when I say "I don't care," what I mean is I am going to love my child and respect their pronouns no matter how often they change them. If my child decides to use he/his/him again when they are 25 years old, for example, does that make their present day experience of their gender invalid? Nope. I'm not going to give you a literature review of the science that supports me supporting my transgender child. You can easily find it yourself, if you're so inclined, because it is out there in droves. Instead, this a review of my experience and my current, ever-expanding and evolving thoughts on the matter.
There's beauty in listening to my child about their own experience of their gender. Why? Because if and when they "change their mind" again, it will not be a source of fear for them to tell me. They know I will support them, regardless. Also, I must note that "change their mind" is used tongue in cheek, because mind changing is not really what's going on when someone changes their pronouns. Rather, I think self-discovery is the more apt term.
When done right, parenting stretches us and forces us to grow beyond our comfort zones. It exposes us to unfamiliar ideas and increases our capacity to love within and around things we don't understand. It shapes us as much as it shapes our children if we let it. Those are just some of the reasons I don't give a flying f*ck when my child changes their pronouns, and here are some more: