roundabout I think you are being obtuse. There are, obviously, 2 separate 'things' being talked about:
The law and the reason behind it. For some the 2 are indelibly linked.
No one has said Tesco are boycotting Nestle.
I, and others, have said we are boycotting Nestle.
It is possible to read into the current legislation re promotion of formula that any incentive is banned.
Tesco have chosen to read it that way. I think that is fine!
I would acknowledge Tesco's stance even more if it weren't for the unfortunate issue of their having had a number of 'accidental' promotional offers for formula.
Ergo: we still disagree. So what? It doesn't mean either of us is wrong, just that we see this differently!
I have acknowledged my bias!