That's the typical duration of a breeding program for any outdoor crop to commercialization.5 to 10 years? Thats much longer than the 6 months you get to nail it and produce flawless product of the highest standard.
Well not sure where you are, but I've seen plenty of high quality greenhouse grown weed. Just because one place can't get it right doesn't mean others can't too.Even that high THC "sun powered" weed they grow in the greenhouses here is garbage. They basically built these giant greenhouse facilities. And hired these horticultural experts and breeders. And it was a joke. It was literally roobs and nobodies trying to buy genetics with a credit card. And they ended up doing 60 rooms of the same poo. Which literally is in trucks driving around once a day. Because it's the only way to store it. And where does it end up? Yep. The landfill. Literally the guy with 200 lights and a warehouse was the guy they just needed to pay. And they couldn't figure it our. Lighting up 10s of thousands of bulbs. Boy did they learn. Took them at least 10 crops to go broke. Not too bad. But at the end of the day. Sabotage. And trying to compete with gangsters makes it real hard to win.
Anyone doing a startup under the sun should understand that year one is phenotype discovery. Year two is production. A lot of folks skip the first step and end up about where you describe.