I have 2 cars, a 2008 Toyota Camry and a 2017 Mazda 3. The Toyota oil change is either 10K mi or 1 year and the Mazda 7500 mi or 6 months, which ever comes first. I use synthetic oil in both. Why such a difference and if I only drive 4K yr in the Mazda, why wouldn’t the oil last longer than 6 mo? We don’t have much extreme weather in the Bay Area.
After the warranty period is over then you probably can do one year or 6000 miles . But until then your warranty depends on following what Mazda specifies . That simple.
Engineers come up with this stuff for lots of reasons I don’t know about. But some cars are designed to run hotter than others and there’s probably many other reasons. Oil changes are cheap compared to engine wear. I always follow the recommendation for that reason.