There's a cost to the utility for connecting and managing home generated power. It requires an additional layer of isolation, spread across thousands of producers, and it's less predictable. In places like CA and Australia where there has been a rapid and widespread uptake of home solar, there are real headaches with maintaining balance between grid inputs and loads. Major spikes in power when the sun comes out are a challenge, as thermal power plants can't easily or quickly taper back or shut down (natural gas is somewhat agile, coal is much more monolithic).
Utilities in these places have reduced feed in tariffs on home solar, sometimes to zero, to subdue ongoing rapid growth until the grid has sufficient management features in place like grid scale batteries, pumped hydro, etc. They do want the growth in solar to continue, but at a manageable pace. Nowadays the rebates and incentives are directed at storage batteries in homes, to soften those big spikes and plunges from solar.
Utilities have to be careful that they are covering the true cost of accepting renewable power when they set rates and feed in tariffs, otherwise you have a situation where existing, non-solar customers are subsidizing the renewables people. I can't see BC Hydro sustaining a 1:1 feed in rate for very long. It's an incentive to get momentum going, but doesn't pay for its management costs, so cannot responsibly last long term.
