I suspect it is the latter but since your domains are not really listed, I'll reserve that opinion.
Re-read your original post and then this sentence. They both contradict each other
If you speak to a woman in the marketing dept, she will probably understand very well the value of a good domain name.
good domains sell, an end user is an end user! regardless of gender
First off this is certainly not a gender issue, Women understand domains the same as men. We don't know what the names are, like in 90% of all posts the most important thing is left out.
Secretaries are often women, and they are the first line of defense against spam in the company (after the antispam itself). So indeed they filter out a lot of unsolicited mail, which can lead to high rejection rate from women.
So I think the OP's comment would be better written as:
By selling domains to end-users, I got an impression that the women I contacted are absolutely not interested in buying even more superfluous domains that they or their companies don't need.
Ok, here is a concrete example, in fact the situation about which I created this thread (and not to cause feminist reactions to allegedly underestimating female intelligence and potential abilities).
About my domain, JewelryStoreNewYork.com (1,600 exact match searches per month in USA on Google) I found 100 sites, whose owners might be interested in buying it. Of course, these are websites owned by Jewelers whose stores are located in the New York area.
To my surprise, it turned out that 85% of women's owners. I was surprised, I must note this because of possible feminist reactions - not because I think women are less gifted for this job, but because of the fact that here in Europe, where I live, the vast majority of jewelers are men.
Then I created this thread, expecting to bring out personal statistics of more experienced members of this forum, regarding the interest of women to trade domains in general.
Since, apart from the criticism that I am a chauvinist, I did not receive any specific advice, I sent about 150 e-mails with offers for selling the mentioned domain, mostly to the direct email addresses of the owners of those jewelry stores. In the subject line I wrote: Jeweler Store New York.
The result: my email was opened (read) by 8 men and only 2 women. Unfortunately, there were no concrete offers for the purchase. That is sad, having in mind that most of the domains under which these sites are worth nothing, and some are funny (MadeInEarthUS.com, QuietStorms.com, BrooklynCharm.com, ShapeOfLies.com, TheEndIsNearBrooklyn.com, Mr-Diamond-USA.com, OutletteNYC.com, YoursAndMine.com, CatbirdNYC.com etc.), and most of others begin with the name or last name of the owner(s), probably with the intention of becoming a brand on a distant day, for which the chances are very small due to the enormous competition.
In short, the domain travels to Afternic and Sedo with great chances to expire before it is sold.
BTW, I note that I also sent mails about other domains to owners of sites where the owners were men and women at about 50:50 ratio. Emails were mostly opened (read) and sometimes bought by men, until the response of women was negligible.
IMO, women are far less interested in this topic, so knowledge in that area is limited to them. Of course, I'm talking about most women; respect for exceptions.