Because business cares about business and moves too fast to get it right or waste time on values, and by the time enough people might object the network effect or inertia or tech debt or whatever you want to call it has become The Way It’s Done and nobody can stop long enough to fix that.
Business is in competition with other business, not in competition with 'doing things right'. Forcing businesses to 'do things right' is called regulation and will get you lots of subcomments on how that's bad here on HN.
