Not really. The 2020 27' iMac had the same resolution, but still the brightness was 600 on the Studio Display vs 500 on the iMac. No earlier iMacs I have seen had brighter displays either.That is the first interesting argument I have heard yet, but really the studio display are not better than the one in a 2015 iMac.
The price is high, yes. But in my experience, they tend to last a long time too. Many times have I seen Apple displays in use 10-15 years later, adapters allowing.It’s also 1.5 times more expensive than a 2020 iMac in itself.