Always?
Funny stuff... but you know you're speaking in absolutes so...
Granted, some folks are going to live in the past and that's cool. No need for them to check out new approaches. I put my rig up against bigger ones quite frequently. If I thought a big rig sounded better I'd use one. Instead, my rig sounds exactly like I want. So even on gigs where backline is provided, I chose what sounds better to me in the mix. And I only carry one small cab for any gigs I do.
If I had backline and roadies provided for every gig I do free of charge, I'd have them bring what I carry.