it’s one of the best in terms of collecting metadata and stats regarding your heath

...and sharing that to Apple, your mobile provider, the government, your health care provider, and every huge business who wants to know everything about you against every single bit of privacy we as human beings should have by default. Apple is an evil corporation (and so is Google, and Amazon, and Microsoft, and tons of others) and the less information you give them, the better. If you want to monitor your health, find a device that YOU control and does not give the information to anyone you do not approve of. (And Apple will say they don't, but it's been shown in the past that this is a huge lie for so many other things they swear to keep private.)