It doesn't have to have been engineered to have escaped. Why this convolution keeps happening is beyond me, we "know" this isn't a bio-superweapon. Taking this as read, either: Researchers at the lab failed to spot something like this in the wild, in an area where they were looking for this. So, failed to raise the alarm appropriately with acceptable transparency. or, Researcher work at the lab led to the collection…
Didn't the article cover the scenarios you mentioned? The article said that the lab's normal job was to look for new bat viruses, and that it's pretty hard to get infected from a qtip swabbed over a bats anus stored in a stabilizing solution. The bottom line is that the evidence we have at this time points to nature as the most probable origin, and it's not unusual for it to take many years to figure these things out…
Keep in mind that circumstantial evidence is also evidence: such as the earliest cases happening in a single-digit mile radius from one of the worlds few labs studying gain-of-function in coronaviruses, while bats are hibernating, a thousand miles from the nearest bat colony, and the extraordinary response and threats re calls for investigation from officials.
To me, that far outweighs the idea that some - NOT ALL - researchers have agreed that if there was editing done it was very smooth.