The reasons given are all contributing factors, but the central issue is this:

Business, particularly under capitalism (where ownership is detached from operation) is about making a profit, not making great products or services

So price discrimination, corner-cutting, price gauging, vendor lock-in, planned-obsolescence, monopoly power, are all tools to increase profits.

> capitalism (where ownership is detached from operation)

That is a really eloquent way to phrase one of my main gripes with capitalist societies. Thanks, I will be stealing it.