I lost trust into Microsoft when they put an "Outlook" app into the Android app store, which when connected to an Exchange server downloads all the account mess

I lost trust into Microsoft when they put an "Outlook" app into the Android app store, which when connected to an Exchange server downloads all the account messages and calendar data to a cloud server (probably in order to have push messages whithout changing Exchange itself). Really Microsoft, why do you think I have an Exchange server. Because it is easy to set up, administer and costs nothing?