There is no substitute for clean oil in an engine.
Maybe the synthetic oil does not break down and it will lubricate appropriately, but I have noticed that my oil gets darker and darker on my bikes, and that means dirt in getting into the engine from outside...probably through the throttle body.
There is no way I am gonna go 10k on the same oil.
My next oil change will be 3 thousand, then at 7k and then the 10k service.
The first 12k miles are usually the complete break in period. So my philosophy is that during this time, I want super clean oil in there.
So now your a mechanical engineer

Frightening what little knowledge brings out in people

No engine oil ever breaks down its the additives in the oil? The reason oil gets darker is carbon deposits not dirt, if it were dirt then the engine wouldn't last two minuets all the bearing surfaces would be ruined within very little time of the engine running.
If the correct oil and filter is used then there is no reason to change any earlier than the recommended period set by the manufacturer. They have spent 5+ years in research and development and the oil change period will be well within the actual range that the products will last.
If you want to waste your money then this is entirely your choise
But don't post bollark's that encourage people to waste their money just because you think that clean oil is better oil

Using the correct spec and best quality oil no matter the colour will keep the engine in good working order to the specified period.
I am a mechanical engineer and have been 40+ years my understanding of engine components oils filtration etc has taken most of my life to gather. Not reading a manual then scratching my head and arse wonder what the #### to do next.
Due to the advancement in technology in oil & filter development these sort of distances are only the beginning totally sealed for life engines are on the horizon.
Chaos