Women should be able to open things

First reaction - Men whose "young adult" days were well back into the last century also want to open jars. If you're willing to use a tool or two, it's still easily done. Maybe the difference is that I got used to using tools, back when those were more-manly things like screwdrivers and socket wrenches?

Second reaction - If you want the food to be safe to eat, but without the extra cost and hassle of jars with separate home-canning-style lids and bands, then being hard to open may be pretty inescapable.