In addition to the other responses to this comment, I'll note that Eisenhower Tunnel has tremendous stress and inherent danger in and of itself. Let's follow the other route of this driver's path.
Coming out of Georgetown drivers begin a long, steep incline up to the tunnel. As you climb the last few miles to the tunnel, the speed limit drops from 65MPH to 55MPH and you have some folks who instantly do the -10MPH acceleration and you have others who don't think that they need to slow at all. Then comes the jockeying for position with insane zipper merges as everyone squeezes down to 2 lanes. Once you're in the tunnel, the speed limit drops again and the it's clear that the "no lane changing in the tunnel" is roundly ignored as cars zip in and out of lanes. This lane changing sometimes leads to poor choices as someone who believes they're making a good (though technically illegal) move must immediately brake because they didn't see the slower car in the other lane to which they've moved. This all happens in a tight, two-lane tube.
Once you exit the tunnel, we're once again treated to an expansion to four lanes and it's a mad dash to fill all lanes as fast as possible to see who can make it to Silverthorne first. All lanes filled. We're now on the windward side of the mountain and here, anything can happen. Snowstorms in July. Slushy roads and a swarm of Subarus and Jeep Grand Cherokees either blasting past you at 70MPH or clogging lanes at 45MPH as we all manage the steep descent into Silverthorne. One (maybe two) runaway truck ramp is all that's available to you as you have to navigate the chaos around you.
I drive both roads frequently because I love the mountains and I love heading west end exploring this area. This driver risked far fewer lives taking by Loveland Pass than he did by staying on I-70. Since you've later admitted to having never driven in the mountains, I think it would be best for you to scale back the rhetoric until you gather a bit more information.