Nature compells us to work for food anyway, that’s not exploitation and coercion, that’s just survival.
The construct of society is predicated on the idea of “from each… to each…” That saying often gets conflated with left-wing politics, but that’s just the point of animals (humans included) grouping together; after all, what’s the point of living in society if it doesn’t convey any benefits to the individual that they could not provide for themselves? That would be exploitative of the individual. But if they are benefitting, then it is only fair and just to also give back to the society one extracts benefits from, otherwise it is exploitative of the others.
Put another way: no one should be obligated to participate in society, but then society should likewise have no obligations to the non-participants.
Consent is a bad metric because it ignores externalities—stuff like economic incentives, implicit threats of loss of basic needs, propaganda, trauma. Someone can be said to consent to exploitation, even if they only did so to continue surviving under oppressive economies/states. I “consent” to have the value of my labor extracted, pooled, and distributed to business owners in the same way I “consent” to the privacy policies (and the sale of my Personally Identifying Information) of the software the company I work for requires us to use (to remain employed)
That’s why I prefer focusing on exploitation. Someone doesn’t have to know they’re being exploited, agree that they’re being exploited, nor even want to not be exploited for it to still be unjust to exploit them and identify when it is happening. Veganism is a stance against animal exploitation.