It’s well known that TG infection increases risky behavior. So I’m not the least bit surprised that there’s a correlation with entrepreneurship. Or what did you mean?
But your point is still valid. The conventional wisdom on why risk-taking people might be more prone to toxoplasmosis in the first place is that they're more likely to eat undercooked or other ill-prepared meat, which is actually a much more significant risk factor for toxoplasmosis than cat ownership.