They can carry more passengers OR cargo vs a truck. I love minivans, but the only way you’re getting anywhere near a pickup-truck sized bed space is by folding/removing all the seats and making it a two-seater.
And even then, you can’t put anything wet or messy back there.
Pickup trucks have their upsides for people who need them.
SUV’s don’t make much sense to me, other than the case where you need the people space AND you need to tow something heavy.