My suggestion is to try them and see if they make a difference for you. You don't really need them, but they sure do help in many ways. One way has already been mentioned and that is falling and keeping your hands from getting road rash. They also help with the numbing issue a lot of riders have from not relaxing their shoulders or an improper bike fit or both.
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HCFR Cycling Team
Ride Safe ... Ride Hard ... Ride Daily
2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress