And looking at the video, my thought is: “and that’s just one bomb that was dropped in the Blitz”. 
Indeed. And more still in Germany and elsewhere in mainland Europe, of course.
Grey’s Anatomy had a very similar event - a two-part episode where a guy had fired a homemade bazooka and the shell was lodged in his body, unexploded. Looking it up, they are “It’s the End of the World” and “As We Know It” from Season 2.
I’ve heard of people with violent mental problems described as “walking time bombs”, but sheesh … that guy’s ridiculous! 
“All army & emergency service personnel are accounted for.”
That’s not exactly the same as saying no one was hurt. 
If they were doing what I think they were doing, then it was a remote procedure.
Tripler
The only thing that should’ve been hurt is some feelings.
Getting back to the question in the OP: or, you could just wait until the UXO goes off by itself. In Tokyo. Under an airport runway. Yikes!
To clarify the record …
The dateline of that article is Tokyo. The UXO that is no longer “U”, just XO was at Miyazaki, a small city on the southernmost main island of Kyushu, roughly 550mi from Tokyo…
I imagine there is still a lot of UXO in Tokyo, although this wasn’t part of it.
Apparently the aerodrome goes back to a WWII Imperial Japanese Navy airbase, so it makes sense it would have attracted a lot of bombardment attention in the end stage of the war.
Another one, this time in northern England:
That particular airbase was one of the major bases for launching kamikazes during the battle of Okinawa and got a lot of attention.
As runways are easily repaired and the planes would be dispersed to mitigate destruction, it was bombed repeatedly.
It looks like they were practice bombs, but they do have charges so they needed to go.
From the same article:
Here’s a short movie from the 1960s about bpmb disposal in the UK
I live in Plymouth, and my sister was one of those evacuated. The bomb was found very close to the naval dockyard, where the navy bomb disposal squad is based.
Incredible. I can’t buy a toaster oven that lasts more than three years, and yet here you have UXBs that can still go off after 70!
That’s because the bomb is a one-use item.
And we can’t overlook the fact that the bombs didn’t work when they were originally supposed to. That’s comparable to a powerful flashlight that won’t turn on until you look straight at it.
Why know where an unexploded bomb comes from? That may have been addressed above; I didn’t read everything written in the thread. But as a former USAF munitions officer with an EOD unit, I can tell you that my guys wanted to know everything they could about unexploded munitions before doing anything else.
Different bombs had different arming/disarming details that vary quite a bit depending on country of origin and the model of the fusing. Knowing what a particular bomb is makes it a lot more safe to work on. Going in and moving or defusing without that knowledge increases the dangers for everyone involved.
EOD personnel may be crazy, but they are not stupid…at least the ones who survive.
. . . that also vary depending on the condition of the UXO as found in-situ. Your M904 as found on a pristine ‘belly-lander’ is a lot easier to RSP than the ‘nose-in first’ where things are all smooshed-to-hell in the nose well.
“BIP it, man.”
Tripler
Fun times, fun times. . .