I think this complaining about home kits is silly and useless. CND and OPI are very different companies in revenues, size and philosophy. Although both started in the dental industry, they have ventured into nail care in different ways. Both started with a focus on salons, but over a decade ago OPI moved towards the consumer market, where they have become a major force. OPI has been working both sides of the aisle for over 15 years, CND has made nail professionals and cutting edge products for them its focus.
It was almost inevitable that OPI would come out with a gel polish line; it seems everyone has one nowadays. I think it was unrealistic to expect that they would create a product and then exclude 80% of their market (women to don't go to nail techs) from it. What OPI did was to create a professional line in GelColors and a consumer line in GelShine, that way there is limited crossover with consumers using professional products. CND has a situation in which consumers can access and use their professional line.
You may choose to do business with a company that has made and maintains a focus on nail professionals. You may prefer their commitment and service. You may prefer a company with a broader vision and experience from working both ends of the market. Each has its benefits but there is considerable overlap. The fact that CND's president/CEO has moved to OPI as president speaks to that. But ultimately the critical issue remains - access to products is not the key to success. If you cannot provide a better experience and do better with your professional products than a consumer can with home products, it's time to hang up your gel brushes and go home.