It appears Google tries to degrade alternative application stores to just another app offered through the Play Store, and therefore subject to Google’s policies (including an annual $5,000 fee for policy and security reviews). So I wouldn’t be surprised this is very much intentional: as to force application stores through a channel controlled by Google, to technically allow competition (at Google’s discretion) while ultimately killing “side-loading” through other sources.
It appears Google tries to degrade alternative application stores to just another app offered through the Play Store, and therefore subject to Google’s policies (including an annual $5,000 fee for policy and security reviews). So I wouldn’t be surprised this is very much intentional: as to force application stores through a channel controlled by Google, to technically allow competition (at Google’s discretion) while ultimately killing “side-loading” through other sources.