If I wanted $4-$600 over-ear headphones to go with an iPhone where phone calls and general phone integrations are an important part, then I'd seriously consider

If I wanted $4-$600 over-ear headphones to go with an iPhone where phone calls and general phone integrations are an important part, then I'd seriously consider these. Otherwise not. As you say, as far as headphones go you can get better for less. But if seen as a phone headset that also has some hi fi qualities, then it makes more sense to go with the ones from Apple. I trust Apple to make that 100% integration with my iPhone whereas I don't necessarily trust Sennheiser to. The third party ones will turn out to drop calls more frequently in iOS 15 or something similar. That's the kind of issue you are paying to avoid.