The hi cam Guzzi engines (v10, Daytona /Centauro /MGS01) have two camshafts, so will need higher oil flow than a single cam V11. The normal running oil pressure and relief valve setting are likely to be similar for all engines with plain crankshaft bearings. Guzzi used a bigger pump on high cam engines to achieve optimum pressure because the oil flow is delivered to more outlets. So to answer your question, there's no value to fitting a hi cam relief valve to a V11.
There is a happy range of oil pressure in a piston engine with plain crank bearings. Too low and wear/damage occurs. Too high causes bearing scouring, among other bad things. The relief valve takes care of "too high" when the engine oil is cold or the engine is running at high rpm.
The flow of oil lubricates, and carries away heat and wear debris. Also important is the action of suspending moving parts from touching each other. That hydrodynamic wedge in crank bearings is important, and between the cam lobes and followers, it is critical.
For me, this all means use good oil, change it regularly with a good filter, and avoid extended idling.