Indeed. Regarding all the GOP that can induce a risk of overusing, when the risk becomes reality (go around due to badly managed flap 3 landing, return to parking because of not enough fuel taken on board, takeoff attempt with only one engine running and subsequent consequences, even the more unlikely but much more serious crash due to fuel starvation), it annihilates in one go several years of fuel efforts.
I think it more sensible to pay a little more at a time, than to risk having to pay a lot in one go.
It's the principle of insurance. Carrying more fuel, and applying GOPs with less motivation, you pay for an insurance. You may lose a bit overall* but that's the principle of insurance too. And you make for easier daily operations all the time.
*you may lose strictly on fuel, but what about customer impact when they notice the service is not provided correctly due to overoptimization ?