If your company is on the brink of collapse and you need funding to stay afloat, will your new majority shareholder be just as trustworthy? If you make if big and the difference between a million in revenue and a billion in revenue is misusing personal data, can you resist the temptation? Those are the concerns and you're not providing answers to them.
Like it or not, 23andMe is going down this path right now with millions of customer's genetic data and you're going to get the same scrutiny when you ask people for personal, intimate data.