I agree.It's just my opinion, but I'd say that either way your oil will be fine and most likely it will be other things on the bike that cause it to fail. Most bikes are sold because the owner gets bored long before the motor fails.
I'd like to see a comparo though with like 10 different brands of oil, some Dino, some Full Synth in the same model bikes and ran for the equivelent of 100,000 miles and then tear down the engines and measure the engine wear.
I remember reading quite a few years ago when SLICK 50 was popular about a test they did with New York City Taxi cabs.
They took a fleet of Cabs, put SLICK 50 and oil in half and the other half just regular Dino oil. They changed the oil every 3,000 miles on all the cabs and after like 100,000 miles or so tore apart the engines and measured for wear.
There was NO significant wear difference between the cabs with SLICK50 and the Cabs with just Dino oil.
So I personally think that if you use ANY name brand oil and change it regularily you're safe.
Then again, I know a guy who's been using Wally World oil in his vehicles for years and has NEVER had any engine issues. He just changes the oil every 5K.......so maybe it's all about how OFTEN you change the oil and NOT about the brand.