While no one can make the decision for you, I'd like to share a recent experience.
I just replaced both cylinder heads on a Customer's '05 MDX because of a seized water pump that took out the timing belt,the tensioner and idler rollers, and, subsequently, bent valves on 3 of the 6 cylinders (2 cyl. on 1 head, 1 cyl. on the other). The tensioner and idler rollers were absolutely destroyed. I'm surmising that the heat generated by the friction of the belt sliding over the seized water pump pulley melted the bearing seals and grease, causing their failure. Technically, the belt never actually broke, but it reduced itself to a collection of reinforcing cords held together with bits of melted belt with the outer rollers of the tensioner and idler fused to it. I have it hanging in my shop as a horrible warning...
Anyway, this vehicle had right around 160,000 km (approx 100,000 miles) when this happened. The original timing belt was replaced by an Acura Dealer at approx. 100,000 km. No other parts were replaced when the belt was done since they probably looked fine at the time. It should be noted here that the water pump failure occured right around the mileage interval that Honda recommends the initial belt replacement.
While I doubt OEM Honda water pump failure at this mileage could be considered typical, I personally don't take chances that the pump nor the other timing components will last until the next belt change interval. As a matter of fact, if a Customer balks at having all the critical components replaced I don't take on the work. After taking the time to explain to the Customer my reasons for wanting to do this, very few decline and go elsewhere.