It's naive to think that it won't. Unsupported cynicism is just another form of naïveté.
I think most of the people making comments like this just have never worked at a major tech company. It's all a black box to you, so you default to the worst interpretation.
I'm not saying that Big Tech won't respect it. I'm saying that, if privacy and intellectual property is a major concern for your company, you can't trust a checkbox - you have to keep the data in-house.
Most companies won't have this level of risk aversion (maybe defence?).