Straight furs such as myself are rare, but I'm going to call it a matter of coincidence above anything else. It's never been an issue for me personally, perhaps because I'm only marginally interested in dating and for the most part just want to socialize, perhaps because I can take on the role of a male character and have no strict preferences while playing a male.
Being both straight and female can be a little alienating sometimes when it seems there's a lot of groups and things catering exclusively to males, but I can appreciate the furry community offering safe spaces for LGBT individuals or those who are questioning to explore, discover, and express their identities. Some things just aren't meant for me, and I'm okay with that.