> At worst, the former is a neutral in his overall contributions
No, with an extra teammate the expectations on your team increases, so you have to work hard enough to pay for that guys salary as well.
Lets extend this a bit, would you prefer to work in a team with 5 incompetent but nice persons who don't contribute anything, so your work has to be enough to pay all their salaries, or would you want to work with 5 assholes who work hard enough that you can slack all day because they pick it up? I'm sure a majority would prefer the second scenario, the first scenario would lead to burnout really quickly and soon they will call you the toxic asshole genius.
No, with an extra teammate the expectations on your team increases, so you have to work hard enough to pay for that guys salary as well.
Lets extend this a bit, would you prefer to work in a team with 5 incompetent but nice persons who don't contribute anything, so your work has to be enough to pay all their salaries, or would you want to work with 5 assholes who work hard enough that you can slack all day because they pick it up? I'm sure a majority would prefer the second scenario, the first scenario would lead to burnout really quickly and soon they will call you the toxic asshole genius.