For me, it’s about comfort and convenience. DD was 7 on our first trip to WDW. We stayed at CBR. We didn’t like it there, so our next 2 trips were at All Stars Music. At that time, value worked for our budget, but once we could afford to stay deluxe, we have become accustomed to it. If we really needed to travel on a tighter budget, we would go back to value again. At no time have we considered staying off-site. Staying onsite keeps you in that magical bubble.
The one trip that we spent a week in WDW then went to Universal, the magical bubble popped. We may as well have gone home.
The value resorts offer low prices while retaining the magic and convenience of never leaving WDW.