I applaud him for starting the debate.
Actually, he called them 'cowboys' simply because the other crew didn't happen to agree with his particular modus operande.
His initial comment was totally out of place, and further, the IB crew I suspect knew perfectly well what they were doing...and said so.
And it worked.
Of course, the 'complainer' was a BA type (it seems) so I am not surprised in the slightest.
Perhaps these types might keep their big noses out of other folks business...
Naw, that would never do...they are the 'experts', according to them anyway
Total Atlantic crossing with an engine unserviceable...yep, they is the experts