Max Weber's "Protestant Ethic" did not refer to the teaching of Luther that are mainstream in Germany but specifically to the Calvinists and Pietists that brought their value to the US.

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https://en.wikipedia.org/wiki/The_Protestant_Ethic_and_the_S...

When he discussed it in the Protestant Ethic, he used Lutheranism as the chief example of the unio mystica that contrasted sharply with the ascetic posture. Later he would associate "Luther, the symbolic exponent of bureaucratic despotism, with the ascetic hostility to Eros — an example of Weber's sporadic tendency to link together bureaucratic and ascetic modes of life and to oppose both from mystical and aristocratic perspectives."

However, Weber saw the fulfillment of the Protestant ethic not in Lutheranism, which was too concerned with the reception of divine spirit in the soul, but in Calvinistic forms of Christianity.[6]: 32–33 The trend was carried further still in Pietism.