i believe there is some unconvencional value in the advice in the article for the intraverted dudes with low self esteem like me. Given any hypothetical opportunity people like me will evaluate the chances of the positive outcome of the opportunity lower than extravert dudes with higher esteem, and will reject the opportunity outright. While your advice suggests the default behavior, the advice above stresses the need to increase the number of attempts, irregardless of whether they are successful or not, and by the law of large numbers, this might result in higher probability of positive outome/s.
Therefore, setting the goal of being rejected more often, might be more productive than waiting for the "right" opportunity to acieve the desired outcome.
p.s. usually I'm not that wordy.