I say the same sentence at the start of every session where somebody might hand me money: take this with a grain of salt, I could be biased, because this is what I do for a living. That sentence costs me people in the room. I keep saying it because the alternative is asking for money while pretending I have no position.
I had to accept that the thing I was best at, the thing I had built a company teaching, was the half that got cheap. Everything I know now sits on top of that, and I did not enjoy learning it.
And I still shipped the broken signup. The person who built it and the person who could not see it were the same person.