Counterpoint - during typical (consumer) usage hardware spends most of the time idle. Hardware capable of sustaining the maximum workload indefinitely is likely to have a lower maximum in practice. Unsustainable bursts are likely to provide higher overall performance for typical workloads, so it makes sense to optimize the hardware design for those.

I guess, but workstation class laptops still overheat, so again, piss poor design.

I'd be willing to bet that a "workstation class" laptop that had sufficient cooling to run continuous benchmarks without overheating would be quite unpopular in the market, because of the weight/size burden.