Women do purchase more conventional sex toys than men do, however. This suggests that women, even when they can get sex, are not as satisfied. If we go with the idea that dildos/fleshlights are not necessarily objectifying, it still leads to the conclusion that both men and women are dissatisfied, but they deal with it in different ways, with some men buying sex robots. An alternative hypothesis is that women on the whole simply don't objectify as much, and would not be in the market for sexbots. Yet another hypothesis is that these women feel as though the technology for male sexbots is not good enough yet (and an associate hypothesis for that would be that women look for other features in sex which cannot be so readily emulated by a robot).
I do think male objectification is widespread, but it differs in quality and scale. If male objectification is big, then female objectification is huge. The hypothesis relating to sex robots supports that, but I'm willing to accept it is only one of many.