Ok... Hear me out... let me give a magical analogy for all these arguments..

Say there's a subscription box service for clothing. it's pretty popular and they usually have lots of styles that both guys and girls can wear, even really sexy options. In the past they were a bit more stingy on guys and girls wear, but they loosened up a bit once they entered under new management. They have somethings specifically for women/men but most of these decisions make sense and you could still get them anyway even if you weren't actually a guy/girl (like bras, etc).

Then, one day, they are getting to release one of their deluxe packages that people have been looking forward too (as well as pre-ordering for). It should have all kinds of innovative styles and such. And one of the things that are being advertise is a high-quality halter top. A lot of women and even some of them men were looking at this halter top and thinking "Oh! That's cool! I can't wait to order one!" however, in their preview pictures, they only showed female models. "Well, this isn't really too big of a deal, even if it's designed for women, the guys should be able to order them too."

However, later on, in a bit fashion-type show. They also announce some really nice muscle-showing sleeveless shirts. A lot of the guys are really excited, some of the girls too. BUT, then they announce that only men can buy the muscle shirts, and only women could buy the halters. FUTHERMORE, they would be putting in measures to keep women and men from buying the other top directly into their profile, making it all but impossible for men to buy the halters, and women to buy the muscle shirts. They cite reasons of of the package's themes and saying that having women buying muscle shirts and men buying halter tops would go against the theme of the release.

Of course, this doesn't affect everyone. Most men/women wouldn't buy these products.
However, the fact that they are making such an active effort to keep the other genders from buying these pieces, when previously they've been more lax with such things before, has caused many people to be upset. Some are pointing out that, even if this is "off theme" There have been other deluxe packages with options that go off theme before. Some of these upset people are now canceling their pre-orders for the deluxe package and trying to cancel their subscription, onnly to find that, because they have already accepted one item that was considered a bonus, that they cannot get refunds for the more expensive deluxe package.

Why would these people be "entitled?" in any way?

We're not saying that everyone has to buy the Halters or get the Muscle Shirts. We're just saying it's wrong for them to be gender-limited.