I suspect a lot has to do with labor costs. I could theoretically hire a full-time assistant who could take care of lots of tasks for me either directly or by contracting it out. But, for most individuals in the US or Western Europe, doing so would be cost prohibitive.

Aggregating and streamlining these services do help. In dense enough areas, some people who couldn't have afforded a personal driver use Uber. But relatively few people have the luxury of contracting out all their day-to-day routines.