Again the implication that he wasn't really sorry and was only sad at how mistreated he was by all the mean feminists. Your cynical, self serving interpretation of him and his motivations speak poorly of your ability to have a rational discussion.
My only implication is that tossing around words like "sexism" and "misogyny" are not conducive to rational discussion. Feminists could have asked why he wore that shirt. They could have asked if his wearing that shirt might send a negative symbol to women interested in STEM research. There were plenty of ways to address the underlying issue without the venom spewed towards Matt (and by proxy, many other males in STEM fields).