I've already said I don't have a problem with advertising breastpumps....but have to come back and say the OP is not judging people who use them at all, or even challenging, let alone judging, the usefulness of the product in many circumstances.
I don't agree with her questioning of the ad - but there is certainly a view among people who may not understand much about the issues that expressing is an easy, and even desirable, option instead of bf 'direct' and that expressing can and even should be used instead of breastfeeding in a cafe or anywhere some idiot might be 'offended'.
In fact, expressing is a potentially useful skill for all bf women, to be deployed when it is convenient and appropriate for her and her baby (which might include times when bf direct is not working well, as some posters have pointed out).
Advertising is irrelevant to this, really, it is. For me, pumps can be advertised ethically, as I use the WHO code as a benchmark. There's no need for people to be angry or exasperated with the OP's view or to imagine she is critical of women who express.