Given the chaotic nature of the sprints in the Vuelta having more technical run-ins serves to slow the bunch down and reduces the risk of high speed mass pileups.
That's bullshit. Technical finishes are more likely to see the peloton break up, meaning both the sprinters and the GC riders want to be at the front. Which makes crashes more likely as everyone fights for position.
Sprinters and GC always want to be at the front. The majority of the technical aspects were inside the 3k so the GC guys don't need to worry so much about losing minutes due to a huge crash.
Given the chaotic nature of the sprints in the Vuelta having more technical run-ins serves to slow the bunch down and reduces the risk of high speed mass pileups.