I find this interesting, especially since I'm not handy at all but am planning on changing that once my wife and I get a house.
One thing that I have noticed that may be a source of this insecurity is the significant other. I can't even count the number of times my wife has said "You're a man, you should be able to do that" before or after asking her dad to fix something or work on something. It doesn't bother me and I retort "You're a woman, why aren't you making my meals and doing laundry as well as cleaning", which are tasks I do myself and have no expectation of my wife doing those solely on her own. My point being is that gender roles are typically ingrained in both genders and while a male may be comfortable not knowing how to do something, there may be an discomfort generated by the response of the significant other.
One thing that I have noticed that may be a source of this insecurity is the significant other. I can't even count the number of times my wife has said "You're a man, you should be able to do that" before or after asking her dad to fix something or work on something. It doesn't bother me and I retort "You're a woman, why aren't you making my meals and doing laundry as well as cleaning", which are tasks I do myself and have no expectation of my wife doing those solely on her own. My point being is that gender roles are typically ingrained in both genders and while a male may be comfortable not knowing how to do something, there may be an discomfort generated by the response of the significant other.