"Does anybody really think that they didn't get what they had because they didn't have the talent or the strength or the endurance or the commitment?"

Nelson Mandela is questioning whether anybody truly thinks that they did not accomplish their objectives since they lacked the necessary qualities such as skill, strength, endurance, or commitment. He is likely indicating that there are external aspects or situations that contribute in success, such as systemic barriers or inequalities, and that attributing failure exclusively to private drawbacks is misdirected.