Helene Mayer's decision to join the German Olympic team is a complex issue, and there are different perspectives on whether it was the right decision. On one hand, some argue that Mayer, as a world-class athlete, had the opportunity to represent her country on the international stage and showcase her skills. Moreover, Mayer, who was of Jewish descent, saw her participation as a way to challenge the Nazi regime's anti-Semitic policies and show that Jews could excel in sports.
On the other hand, others argue that Mayer's decision to participate in the Olympics only served to legitimize and normalize the Nazi regime's policies. They argue that by participating in the Nazi-controlled Olympic Games, Mayer effectively gave her stamp of approval to the regime's actions and provided them with a propaganda opportunity.
Ultimately, the decision whether Mayer made the right choice or not is a matter of personal opinion and depends on one's interpretation of the historical context and the motivations behind her decision.