Initial capital expenditure. Why don't all of us living in appropriate areas have solar panels on our roofs to cut down on our electricity costs? Well, besides Aramis, who would have to clear a little snow off his too often for ease. Why don't all 1st world nations institute massive wind power schemes now? Who has the money for them just floating around with those things being the highest priority?
The argument that human power is cheaper is a valid one on a world where birth rates are high and the government(s) may not spend a lot on education or health. Human life, we know from this world, can be cheap.
Really, the issue for automation is four fold -
1) Must have the capital up front.
2) must have a stable labor need
3) must not be barred by the government.
4) must have adequate tech for the types of Robots to do the needed tasks
If you lack the capital, you have to secure investors or financing. Not a unique situation, but in the case of Robots, that capital is several years' pay worth for human workers... Human workers who can be paid in convenient monthly installments as the money comes in.
Must have a stable need...
...as in, long term need.
... as in, limited range of tasks
... as in, limited fluctuation of volume.
For short term, it's cheaper to pay people than to buy robots. Especially for industrial automation, even renting the robots may have significant installation costs. Note that temp workers are often cheaper, even after training time, than installing a robot.
More flexible robots are more expensive. A fixed location tool arm with a 2-ton load is a lousy housekeeping robot... but an excellent factory floor job. A roomba is useless for manufacturing, but may be of use in cleaning up the factory floor. You have to buy the correct types of Robots for the work.
And, robots are most useful when the demand for the product or service is fairly stable. Unused capacity is a waste; you don't want more surplus than your maintenance regime requires. As in, if you can meet your minimium demand during maintenance by taking only one line off production, you don't want 2 lines above your routine need. Ideally, your doing maintenance loss of capacity is just a bit more than your difference between peak and median demand, and leaves enough time to do the maintenance.
The Real World has issues in many places with "Workers' Rights" - as in, people have a right to a job, so employers don't have a right to automate for reduction of the workforce. The biggest impediment to automation is government protection of jobs.
And of course, if the robots aren't able to do the tasks (such as creative content), then replacing people isn't going to happen.
As for solar in Alaska - in the summer, it works fine. In the summer, we don't NEED it. In the winter, there's not enough time with light for them to be worth clearing.