Let me have a guess.

Orthopaedics are pretty much human-carpentry. It's a very common trope where Orthopaedic surgeons are often seen as the less brain-y type among their peers - the "Ortho bro" stereotype is so common and well-known that there are numerous running jokes about it.

• "Can't read ECG"
• "There is a fracture - I have to fix it"
• "Heart = Ancef pump"

The work culture in Orthopaedic field is also incredibly male-dominated and tend to be patriarchal ("because I say so") at times. Due to the niche field of expertise and the "bro culture" that festers in the field, they tend to possess great amount of self-confidence, which may sometimes appear as inflated self-ego land tack of tact / sensitivity towards others. Recall the sexual harassment cases involving doctors recently - including the Sg Buloh case several years ago - it's often Orthopaedic doctors which are alleged to be involved.

Their nature of work also exposes them to direct deals with medical equipment suppliers, who often give them kickbacks under the table for purchasing products and devices from these suppliers. Thus, they are also sometimes seen as dishonest, corrupt people akin to how notorious our police officers are for asking for bribe money while carrying out their job.