Why multiple synths?

I come from the 1960s when 4-track first showed up in studios. We couldn't even imagine how you could fill 4 tracks (plus bouncing). Then along came 8-track & 16-track (mind blown!). Now we have unlimited tracks, triggers, pads & massive amounts of control surfaces & keyboard options. So now, my question: I see these setups with gear laid out & stacked up like a nuclear bunker. Why? I've been composing/recording pop, orchestral, symphonic, commercial/movie music for 50+ years. In my home studio I have one (88 key) workstation, one dedicated synth and one small (drums) control surface. Between those & bucketsfull of VST instruments, sounds & software synths (seldom used), I'm capable in creating any sound image I can imagine. I get that multiple synths can be chained together for a sound/note played on the workstation to trigger another device's programming, but I can already trigger VSTs to do that without all the gear. So, what am I missing? Yes the racks & racks of synths in photos are impressive and frankly look super-cool....but why? What can all that gear do that my little setup can't? Help this old guy from the "tape" recorder days see your "future" vision. Thanks