Definitely mathematical convenience. In many contexts people do sensitivity analysis instead of bayesian updates. It is good to phrase things as bayesian updates, if only as a different point of view, but when that is the better thing to do (which in this case I do not believe), trumpeting it as right and the other method as wrong is the worst kind of mathematical triumphalism that has destroyed modern science.
Definitely mathematical convenience. In many contexts people do sensitivity analysis instead of bayesian updates. It is good to phrase things as bayesian updates, if only as a different point of view, but when that is the better thing to do (which in this case I do not believe), trumpeting it as right and the other method as wrong is the worst kind of mathematical triumphalism that has destroyed modern science.