I have a 58cm Windsor hour and 175 cranks and do run into pedal strike fairly often. Most of the time it's no big deal. I road the bike for several years and never went down because of it even after so many petal strikes that the petals had bent / been ground down where it happened. It wasn't until a couple months ago that I took a fast U turn and had to lean in very far that I fell.

Your petal on strike: