All perfectly valid points, if perhaps presented with more than ample zealousness where Scot. The equally valid perspective of those scrutinizing the issue with you has been the sizeable increased performance realized from (equally sizeable retail cost of) those neat new aftermarket parts, compared to the likely much lower utility and smaller % performance return seen by welding everything up tight.
I've said it in other threads - crossframe bars, torsion bars, jounce bars and frame gusseting seem like opportunities for best welding. And they are easy enough to leave and sacrifice with the car when discarded.
I've seen where mad scientists have calculated differences between welding and bolted connections. It would be neat using today's crazy software to model the stresses of steering on say a welded v. bolted front frame horn bar.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!