1) The apps used MDM profiles, intended for anyone that requires "Multi Device Management".
2) Children and employees should have no expectation of privacy on devices owned and permitted use by an adult whom could be jailed or fined for my behavior, hence the tight monitoring.
3) If it was so "clearly" against policy, Apple should have noticed it in the past 10 years of submitals.
4) They could have developed the feature when the realized it was needed, that's at least one way they could have accomplished their goal at the time.
5) Apple finally decided to do number 4, because it's been apparent forever.
6) Now that Apple has gained market dominance and developed their own version, they decided to give a very short amount of notice in order to cripple these now competing companies. They could have given something like 6 months notice or something - since the "privacy risks" have been in existence for 10 years, and mostly used to control snot nosed kids from sexting dick picks that could get them arrested.
7) Apple, in general, doesn't allow competition with it's own software products. In any case, they will attempt to diminish competition value - value that helped build their phone and app store in a dominent position to begin with.
8) MDM solutions still exist, else corporations will go tell Apple to fuck themselves and they will buy Androids for their employees. Apple isn't the only control freak in the room. Also, you can sideload and trust apps on an iPhone as well, it's not just an Android thing.
Apple's 'philosophy' is to protect it's own "intellectual" property when it can, and bully and steal from others when it can get away from it.