Clearly people will have a wide range of views how much impact eg a career change to such fields can have, even when considering a specific (non-average) person. This probably answers a good portion of your question regarding why people focus on other areas.
Clearly people will have a wide range of views how much impact eg a career change to such fields can have, even when considering a specific (non-average) person. This probably answers a good portion of your question regarding why people focus on other areas.