How so? I don't have any female friends (I don't have any male ones either). If I started looking for a girlfriend (which I currently don't), I would indeed be looking solely for a romantic relationship, so I don't see how having female friends would be a prerequisite.

That said, I don't think that matters for the site in question. I'm just not a part of their target audience. Doesn't mean their idea doesn't work for other people.

If you really love women, you'll love being friends with women just as much as you love being in romantic relationships with women. If you don't really love women, I'd likely suggest that you just don't date - loneliness or social proof of your value are shitty reasons to get into a relationship.