Interesting, I would be more worried about a weak battery in the city than I would on a big ride. Frequent starts, short rides, more idling will leave you with a dead bike; i just replaced a battery that was declared "a bit weak" at Edmonds but died on me a few times while commuting. Likely it would have been fine on a multi-day highway ride.
But overall OP, given that a decent battery runs you $70 or $80, that's pretty cheap for peace of mind. I'd just replace it and it's one less thing to think about.
That is the thing. A high current load test does not completely tests a lead acid battery.
The other point is, the O.P.'s battery is 9 yrs old. I just don't know enough when or how the sponge lead material, and the grid will fail at that age.
In your case, I am guessing, your battery was not 9 years old right? In your case, your battery just wasn't holding its charge well?
For myself, I would also do a low current load test. But most folks are not going to do that. In addition, I would ride around for about a week and then check the battery voltage. A battery that can't hold its charge well will reveal itself with these tests, and with the addition of the high current load test.
I revive weak and old lead acid batteries as a hobby, but not with 9 years old ones though. I also have a high current load tester. And I have seen for myself how a so so lead acid battery can pass a high current load test but fail on a low current load test. And sure enough, the lead acid battery did not hold its charge well and fail in service.
However, none of these tests will show how reliable the battery is going to be when a lead acid battery is 9 years old plus.