Making changes to how you do things is not about changing who you are. It’s about making who you are more effective.
If you think you have no weaknesses then your biggest weakness is a lack of self-awareness. It’s holding you back.
You might be able to get away with it where you’re working now, but if your company’s growing or you ever hope to move ahead, it’s holding you back.
Eventually the pain you’re putting your peers and boss through working around the stuff you don’t do well (instead of recognizing it and doing something about it yourself) is going to outweigh the benefit of that thing that you’re really really good it.
When that day comes you’re going to get put out on the street. I hope you have a good severance package.