If is a male-only audience, what can we do to make to make the
contributors more equally distributed to reflect the real travelling
population?
Don't try to fix something which is not broken.
I suppose that you have a good intention but the road to hell
is paved with such intentions because it does the exact opposite
what you trying to achieve.
SE in general has explicit standard rules for behaving. The important
part of the rules is that there is no difference to which human being
they are applying. All people have to be treated equally.
If there are instances of behavior which violate good conduct, we can
impose further restrictions and I think everyone here is glad to point
such violations out and work to remove them.
If you call for a specific behavior to promote a particular group,
you are essentially telling people that this particular group should
be treated differently. Something should be done to shift the
perceived participation for a particular group.
It fosters stereotypes instead of removing them. Ask yourself how the
tone of your question changes if we replace women with wheelchair
users and men with walkers. You are asking to treat people
differently on an arbitrary set of attributes. It also begs the
question: Why exactly is it important that I use a wheelchair ?!*
It is also a bit derogatory because you seem to have a very specific
image of women.
We do know that people are reacting differently to different attributes.
It's life. And therefore many people use pseudonyms or change their
perceived identity because they do not want to be treated like the group
they supposedly belong to. As already pointed out, you perceive the
gender ratio but you do not actually know the correct ratio. It is not
our business to know who are you exactly.
*No, I am a walker, but I used to participate in wheelchair competitions.
The term "walker" is the direct translation from the word used in Germany,
I do not know if it is the same in English-speaking countries.
Ask yourself what you imagined after reading this example and why did
you do it ;-)