I don't think anyone thinks that. Warriors won't even beat the Clippers without Curry.If you guys think the Warriors could beat the Spurs without Curry you're delusional. Thunder could probably beat them without Curry.
Bosh is great, but 2016 Bosh pales in comparison to Curry.eh, the Heat have dealt with losing all star starter Chris Bosh again this season and have done fine by all standards. The Bulls were a terrific team when Jordan left for that brief period before coming back for the second 3 peat.
Good teams are still good teams even if one of their top guys is absent. And Houston has been a flaming pile of crap all season and barely made the playoffs so for the warriors to have lost to them at all is some shameful shit. The problem the warriors have is that they're a pedestrian team as soon as Steph isn't around which doesn't speak well about how that team is built. As a counterpoint, i can imagine the Spurs losing a starter and still doing just fine.
The Spurs are definitely built differently with not having to rely on one player, but kinda like Bosh, no one on the Spurs is on Curry's level. When you have a generational talent like Curry it's probably hard not to build around him specifically.