I think the argument is that during that 1250 hours, as PIC, you will be the one making the decisions. Sure, there may be no big specific events that occur during that time, but perhaps there will be. But regardless of whether "big" events happen to you, for 1250 hours you are the guy making the decisions, whether you have enough fuel, if the weather is acceptable, whether the aircraft is airworthy, etc. Even those seemingly mundane or routine decisions do build a solid foundation for bigger, or more consequential decisions down the road.

That being said, as I pointed out earlier, the more recent data from IATA shows that there is negligible difference in safety between the U.S. approach and the European approach.