They interviewed Scott Bakula about it...and he said he was against having a gay man aboard the Enterprise... however he would be open to have a lesbian character aboard. I think that Bakula was only concerned for the health of the series, and was afraid that a gay man aboard just might cause a few viewers to stop watching the series. But I personally can't confirm this.
I think it would be near impossible statistically for there to actually have been fewer viewers than Enterprise
Seriously, I call bullshit. I've been following the franchise for near forty-years and have never heard of such an interview. Care to post proof?