A U.S. Chamber of Commerce official said after the Supreme Court's second big anti-business decision of the term, "conservative doesn't mean pro-business." He's right. On this court (and this has been true for several years now), "conservative" often, perhaps usually, means "majoritarian." The court usually accepts what a majority of Congress or a majority of voters as represented by the presidency wants to do.
In the earlier case, the court allowed juries to continue to impose huge punitive damage awards. In the latest case, a battery company stopped allowing women of child-bearing age to hold certain jobs because the lead involved posed a threat of fetal harm. The argument was that the fetus deserved protection and that the company deserved protection from future damage suits by children whose mothers had been exposed to the lead. Women workers said that was sex discrimination.
In the Civil Rights Act (and in connection with this particular case the Pregnancy Discrimination Act), Congress has said explicitly that jobs could be reserved for one sex or the other only on the basis of an "ability to perform the job" standard. Congress and the courts have allowed for a few exceptions in clear cases of safety involving third parties and for bona fide occupational imperatives, but neither of those was at issue in this case.