As a lowly passenger I actually do have some sympathy for this pilot , He has done nothing wrong as I imagine that his medical etc and testing for his licence was satisfactory. As mentioned in an earlier post how many incident free landings has this guy made in his career.
The company that employ him should have conducted risk assesments etc was there an issue with the fastenings rather than with the fact that his arm was prosthetic. Maybe stronger/ re designed fastenings etc would be the answer rather than screaming for his head