It was the intended, purposefully engineered outcome for precisely such an event. Not even remotely a miracle. The airframe designers at Airbus saved those lives, not divine providence.
There is a lot of variables in an accident like this. If some of those variables were different, this could have been much worse, despite the hard work of the engineers at Airbus. That's what makes it a "miracle".
In general, I disagree that calling something a 'miracle' implies or withholds credit from those responsible for the outcome. It's very pedantic.
"a surprising and welcome event that is not explicable by natural or scientific laws and is therefore considered to be the work of a divine agency."
Or, if you’re an economist, just anything mildly unexpected.