That’s why Martin Luther was smart and got the nailing part out of the way at the beginning.

Martin Luther had a lot of support and allied with the politically powerful. The later Radical Reformation was something else.

I don’t think that support was guaranteed at the beginning, though. Certainly Jan Hus suffered a worse fate, being too early, but Luther could have imagined meeting the same end (before meeting God obvs). The political situation mattered a lot, as did the printing press.