Nah, people are just morbidly curious, no double standards.
If there are a glut of male DV documentaries like there have been female DV docos/campaigns, the public would lose interest too, I guarantee.
The psychology of female victims has been made very well known to the public. We've all already seen numerous documentaries, ads, campaigns, etc. The psychology of male victims is harder to fathom, to me.
90% psychological stuff aside, the fact is, female DV victims ARE actually under physical threat in the moment, and even if they escaped they would still be vulnerable to their abuser physically finding them.
Whereas with male DV victims, it's a 100% psychological game. They've literally convinced themselves not to fight back for decades despite the fact that they could overpower the woman in minutes. In terms of physical size, it's like a woman compliantly letting herself be abused by a small child for years. It's horribly fascinating.
However, say I had a £100 bill I could ONLY donate to either male OR female DV victims. I would donate to female victims because statistically there are more, plus the cause of female DV victims is way more well known. A one-off TV programme I chose to watch has nothing to do with it.
Good thing though, as I said above, that it's not a gender competition or zero-sum game! Whereas a doco about a false rape claim might be, because it perpetuates the message that you should disbelieve potential rape victims.
Male DV docos don't undermine anyone's word, though. Awareness has no downsides. It's immensely childish to turn everything into a gender competition.