I honestly fail to understand the regular 411A criticism. He makes his points in a direct and straightforward manner. Big deal.
The point is that one can replace cabin crew at very short notice and at possibly low cost.
Recruitment is off the street. Qualification requirements are commonplace. Training takes a few weeks and is extremely unlikely to result in a "fail". Training may well be subsidised/offset against tax.
The only thing that is likely to suffer with high turnover is quality and safety. Those factors won't stop the operation !