Consider 1) the multiple security breaches that pop up every week, usually following quite dumb holes (unprotected elastic search, unencrypted reset commands, etc.). I have 0 trust in how these companies store my data. 2) the relative longevity (lack thereof) of these companies that still function on investors money, which means that best case scenario your device is now a brick, worst case your data now belongs to a company the likes of Google that doesn't care (or are planly hostile) for your privacy.
My wife reaaaally wanted cameras in our house, I took ubiquity and didn't connect it to their "cloud", that's the only thing I somewhat trust