Why not?
I recently read
this putting Apple only slightly behind Spotify in the U.S. (and I was talking about the U.S. above).
I don't have everything about them, certainly not. But certain business conduct of theirs, including their entitlement to leech off developers and monopolising access - yes, very much so.
What I hate most: Corporate bullsh1tting and playing games to defy the rules that apply to their business.
It gets tiresome. I'm having my signature for a reason.
But if you insist: retail stores
do not promote and deliver most of their items
for free (Such as what Apple does with all those free-to-download apps - many of which make millions of dollars in in-app transaction revenue, e.g. Uber) - and then charge only a certain subset of suppliers aa whopping 30% - and prohibit them from direct sales and communication to customers.
No, I'm fine with it overall for privacy, ease of use and integration with my Mac.
Purchasing decisions for mobile smartphones aren't about sideloading only.