Undoubtedly you're right Mick. Once your amps/volts/wirespeed/electrode size/filler wire/gas (delete as applicable), have been correctly selected, the whole affair can be ruined by getting your angles all to cock.
Fortunately, at least in reference to this forum, it matters not too much, as mig can be forgiving (as long as no radiography gets involved).
There is a fair bit of literature around re stick manipulation. I just wish my missus would read it, as hers is all to cock, for sure.