I think this falls into one of my catch phrases:
just because you >can< doesn’t mean you >should<
A 10T drive in some cases can take many hours to a day or more to rebuild. There is extra activity to verify data to be rebuilt. Losing one drive (DP) you can still recover. Losing two during rebuild may cause data loss.
engineering put RAID TEC as the default on large drives for one or more reasons.