There was a member here just the other day that had one break and was contemplating the cost of rebuilding the engine. Even if you are not able to do it yourself the job is less than $1000. Considering what $1000 buys as a replacement or the negligible impact it has as a down payment on a new car why risk it? And just because someone she knows has been lucky doesn't mean you will be, like crossing the street without looking. This is all said not really knowing the current condition of the van. If it is otherwise trashed and not worth anything anyway then maybe drive it until it breaks, but my 120K van still looks pretty new and has been maintained in a constant state of lot ready condition, so I am already looking forward to the next TB change at 210K and won't hesitate to do it as long as nothing happens to it in the meantime.
BTW, if you do it don't shortcut it. Do the tensioner and idler as well because if either of those fail it takes out the belt and the result is the same. You are already there so its just the cost of parts. JMO of course. There is a general consensus here that the water pump is likely to make it to 210K, so many consider it optional.