Why can't all women be like this?

I go to a fitness center with a pool. One of the female lifeguards approached me (college age) and talked to me the entire time. She initiated the conversation and kept talking to me for about 20 to 30 minutes.

It is extremely rare for a woman to approach me and start talking like that. Normally, I am invisible to girls.

I pretty much asked her out. I asked if she wanted to "hang out" sometime, but she declined. She didn't seem offended or weirded out, and we continued talking after that.
Why can't all women be like this?
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