and the safety of my flight is guaranteed by my performance calculations.
Well actually, not quite, the calculations you're talking about were largely done by someone else.
And one of those "calculations" is the one that says that you, not them, will be able to bring your aircraft to a safe stop from V1, regardless of how degraded the actual conditions for that stop are compared with the demonstration at the factory.
Are you sure your brakes and tyres are perfect? Are you sure that the stopway and RESA you're heading for are perfect? Yes? Why, exactly? Check them out, did you? It's only a given at major airports; many smaller ones are rather deficient in this area.
Have you looked at the runway surface? Measured its friction? No? Of course not it's done for you. But when? and how carefully? And did a bean-counter decide it was good enough when it isn't? No, of course not, it's "guaranteed".
It won't be your fault, of course, if the stop from V1 doesn't go quite according to plan. Someone else's calculations or actions will have let you down.
So that's all right then; carry on using the intersection because performance is "guaranteed".