Nothing wrong with spacers if they're made from good quality material and torqued properly.
Now, if they're those cast aluminum junkers that they sell, those are a disaster. But a good billet spacer is as strong as the wheel you're attaching it to.
I don't disagree and I know you know this...but the concern comes in first with the fact that without mentioning replacing the studs with longer ones, there's a risk there...
Also, in some situations, spacers can screw up suspension geometry and/or put a great deal of extra wear on wheel bearings.
But yeah, with quality parts, correctly sized and accommodated by longer studs...right on. :)