I'm not getting this whole "embarrassment" thing. First, I don't think most people who bring a stroller for an older child plan to use it all day every day. It's likely for at night after a long day or 4-5 days into a trip when everyone is feeling the effects of walking miles a day. I also don't think anyone if forcing a child into a stroller....again, it's likely the child's choice because they are exhausted. Even taking breaks doesn't guarantee that you won't have tired legs.
Really? In everyday life who do you see in strollers? babies. maybe toddlers. No way would my kid want to be seen using a baby device anymore then she would want to be seen drinking from a bottle or wearing a diaper.
She is proud of her big girl status and that meant leaving baby items in the past.