Really? I thought sincerity in conversation was the entire point of the book! He says quite explicitly that if you're insincere, people will sense it and distrust you.
As for my spouse... yes, it hurts her, and she's aware it hurts her. It limits her effectiveness as an artist, and it limits her career options. You can't "cure" introversion (it's not a disease, it's a personality), but you can compensate for it. And part of that is just cultivating internal attitudes - for example, not thinking of networking as something deceptive and selfish ("schmoozing"), but rather as something sincere and generous.
As for my spouse... yes, it hurts her, and she's aware it hurts her. It limits her effectiveness as an artist, and it limits her career options. You can't "cure" introversion (it's not a disease, it's a personality), but you can compensate for it. And part of that is just cultivating internal attitudes - for example, not thinking of networking as something deceptive and selfish ("schmoozing"), but rather as something sincere and generous.