I don't agree with blocks being strikes for several reasons. One is most blocks are shown to be using the ulna(small bone of the arm) is wouldn't be hard to break with a decent kick. Also the mechanics are wrong for this. You are trying to meet force with force when facing a haymaker. The punch will get through because of the muscles and mechanics involved.(pushing out vs. pushing in) In wins!
The block in this way also puts you both back on equal ground which is not what you want.Keep in mind that the arts were created so that small people could defend themselves against big people. Strike for strike and forced blocks wouldn't work in that case.
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