Static is a good point too... but looking at the way it was soldered, I doubt he'd be too worried about that... lol
Static, and heat damage are not immediately evident, the item may work, it might work for weeks, even months or years, and then one day, it just stops working for no apparent reason...
I am a bit confused about how he considers this to be "the only fast and safe way" I can't think of a less safe method!