Haven’t watched but going by your description alone : absolutely and I think it’s necessary.

Your closest person could be ok with most topics except for a few that maybe you talk to a therapist about as this person would incredibly sensitive with said topics to the point they’d have a meltdown or have very limited experience and start giving terrible and/or biased advice on. And maybe you care about all the other aspects about this person enough that you just save it for the therapist. EG: family trauma, mental illness, etc. and the therapist relationship, while different and not as deep, it can functionally overlap these missing parts and give you what you need to share it.

Or maybe that person does understand but can’t find the right language and say it in the way you need or want to hear it. Or you could have issues trying to share your perspective. Again: what a trained therapist can help you with.

And that is fair. I think we need to understand and respect the limitations of the people we love and respect our own boundaries about such topics. There’s only so far you can stretch a person or the relationship with them. It’s healthy to recognize this.

It’s also important to realize that no one other person on earth is going to be your entire witness of your life. Especially when they are already witnessing their own life. Equally: You are your full witness. This is your journey. You’re just sharing part of your ride with other people.