If that's what you want to do, do that. It will be perfectly fine. You'll never get a straight answer for any question. People will come up with all sorts of "what if" scenarios, "I heard" stories, and FUD. It's crazy to suggest that a full synthetic oil needs change every 6 months and/or 2500k miles no matter the driving conditions, climate, and so on.
I agree. Sometimes I make unnecessary work for myself, as well as extra cost.
I should stop obsessing over the prices of oils. I currently have enough Castrol Edge to last me until April 2023.
I'm 3 years away from needing to buy any more oil.