KIGO: there are already other racing games doing just that, just take
a Gran Turismo for instance. And if you like pure speed, why not doing some
Zones? (or play online with BR disabled).

Without Barrel Rolls, Wipeout would be very boring, especially in Speed Lap /
Time Trials (because during races there are also weapons).
It's simple, I wouldn't play the game without BR; sometimes someone disables
them in online races and I feel that the game is missing something!

Also finding and executing those BRs is very rewarding (you feel good + you
get a better time!)