Is the HDHP Somehow Better for Hospital Visits??

I (32M) been looking at the two plan options from my employer. One option is an HSHP/HSA plan, and they other is a regular open-access health insurance plan. It's weird because it seems like the HDHP is actually better if you're worried about having a long hospital stay? I thought the whole point of HDHP is that it's more risky if you have a catastrophic incident. Here are the differences I'm looking at:

HDHP:
$2,130 annual premium
$2,000 annual deductible
0% coinsurance
Primary care/Specialist: deductible then $30 copay
ER: Deductible then $300 copay
Inpatient/Outpatient Hospital: Deductible then no charge

Open-Access Plan:
$3,180 annual premium
$500 annual deductible
Primary care/Specialist: $10/20 copay (deductible waived)
ER/Inpatient/Outpatient Hospital: Deductible then 10% coinsurance

Basically, if I was going to spend the whole plan year having a ton of specialist appointments (e.g., if I have weekly therapy appointments, plus a few other medium-term needs requiring specialist care), and then never go to the hospital, then the OAP would be better because the deductible is waived and the copays are lower.

However, if I do all of those visits, and then also need to go to the ER or stay at a hospital, then it seems like it would cancel out? Because at that point, in the HDHP, the deductible would have been covered by my specialist visits, and then my hospital stay ends up being capped at just the $300 ER copay. But the OAP would force me to pay the $500 deductible, and then pay a 10% coinsurance, which could theoretically add up to over thousands of dollars. And this is on top of the fact that the OAP's annual premium is already over $1,000 more expensive.

How does this make any sense? What is the point of having a higher-premium health plan that provides worse coverage for catastrophic health incidents then a lower-premium, higher-deductible plan. Shouldn't the higher premium imply that you're more covered for catastrophic incidents?