Yes, they do.

It may help to reread my comment. I'm not arguing that there aren't such conflicts- I was discussing what OP meant. In fact, I'd agree that to some extent the claim being made is wrong. I can easily for example find self-identified feminists who claim that all aspects of gender are not biological. Since one has things like male babies having on average larger birth-weight than females, this is trivially false. At the same time though, one of the serious problems with this sort of discussion is that one can construct many definitions of the terms in question, since in any movement, many different people will use different notions of what they mean by a given ism. Interpreting OP as saying that for many self-identified feminists, feminism doesn't conflict with descriptive aspects of reality is a distinct claim, which should be taken seriously.

See for example all the comments talking about 'patriarchy'.

So that's a pretty broad category, and doesn't seem to support your claim. Such comments have included observations that a) not all societies are patriarchal and some classical small societies have had strong matriarchal elements b) many aspects of gender roles in classical Western civilization were far more restrictive of the formal power given to women than men. Given inheritance laws favoring sons over daughters (male primogeniture wasn't just for nobility, and even classical inheritance laws pre-feudalism often gave an extra large portion to the eldest male heir (look at the Talmudic laws for example), the many forms of higher education that were denied to women (most of the Ivy League schools for example didn't let women in as undergraduates until the late 1960s), restrictions on married women's economic rights (in the United States until the 1970s, it was difficult for a married women to even write checks to pay utility bills), and many other aspects this is difficult to see.

That's not to say that all comments about patriarchy are true. Claims that science is inherently patriarchy run the gamut from incoherent to demonstrably false. Similarly, claims that fluid dynamics have been less extensively studied than general mechanics because of a mental association between fluids and female menstruation as opposed to male genitalia which involves erections, are generally not even worth addressing. But such claims are rare, and aren't necessarily representative of feminism as a whole. Indeed, even on a college campus in a left-wing city, it will often take effort to find feminists who actively argue for these sorts of positions. So overall, any claim that this somehow applies to "all the comments talking about 'patriarchy'" is inaccurate.