It's quite likely that the models in the ads have no objection to what's going on- clearly, they chose to get into the industry. But that's not really the point- there is such a thing as being aware of your environment, and the tech industry has started making real efforts to be more inclusive. If you don't pay attention to this kind of stuff you're going to get a backlash.
Are you saying that they simply made the wrong ad for their tech audience(easier to agree with for a moment) or that they made some huge moral blunder(more difficult to agree with, also the argument by the lady who started the conv).
But imagine, for instance, that she tweeted something similar to @playboy. She'd be very unlikely to get a positive response, or really any support from others. But the tech world is not Playboy, we're supposed to be an inclusive community that wants to encourage more women to be involved.
So I guess my answer is somewhere between your two options- they made a moral blunder in the context of the tech community.