You got me curious enough to look for pictures or video of the interior of the Crew Dragon, and my overall impression is that it's a minivan: A single-purpose machine, optimized to get up to seven people to LEO, aka ISS.

You can achieve a lot of efficiencies with a highly specialized machine.

The suits are lightweight, I think, because they re "launch and entry" suits serving a single purpose: To be worn inside a pressurized cabin, providing protection for a short period in event of a catastrophic loss of cabin pressure. The design margins can be a lot thinner, literally, than an EVA or lunar surface suit. This is a shuttle LES:

Not quite so stylish, but then NASA didn't use the same design firm as designed the Tesla.

Speaking of commercial design, after poking around images of the cabin, it really seems like designers were given the mission to impress people, and convey "that 21st century look". Which one of these is a Dragon, and which a Tesla:

Which is the long way round to those flat panel displays.

I agree with your uneasiness about those panels being a single point of failure. Or three. Crack a panel or fry the electronics, and you take out 1/3 of the capsule's instrumentation and controls. OTOH, I'll bet there's an emergency mode to reconfigure the remaining displays to take over the essential part of a busted panel. Might even be a spare panel in one of the lockers. Touch screens are double-edged blessing that way.

But they sure are pretty, aren't they?

The other mitigating factor, I think, is that this minivan is highly automated. It's derived from a cargo capsule that can make it to the station on its own, where the final docking is handled by a manipulator arm. The crewed version does allow the pilot to fly it in, but I looked and I looked, and never spotted the joystick or translation controller. It probably implements those as graphics on the touchscreen, so the pilot flies the Dragon by pushing buttons, like a Federation starship. If they aren't available, there's always the robot arm.

Bottom line, I think there's a lot of smoke and mirrors to the Dragon, a lot of features driven more by marketing and design than by engineering necessity. Everything's stylish, in an Elon Musk sort of way. The Dragon's a Tesla for space.