Anyone who decides to be their own lawyer has an idiot for a client. It is quite true.
And nobody has to take your word for it if they don't want to. I have zero connection with anything legal (erm, maybe I should rephrase that hehe) but I watch youtube videos since a lot started streaming around Covid, and almost all of the pro se people reeeeaaaaallllyyyyy shoulda gotten a lawyer.
Of course, there is some selection bias as it's the interesting stuff that generally gets posted, but still. Even if you're quite sane, knowing what to do even before a very friendly and sympathetic judge is not easy and you are likely to make mistakes that cost you the case.