That's the fault of the fixture manufacturers trying to take a half truth to sell a product. A led can absolutely last 10 years and still put out ~70% of its original brightness. Go look at your hdtv if you need proof of that. Problem is, a fixture will become obsolete well before that. It is up to you, the buyer, to research the best option, not to have a company tell you.
From your bitterness, you can tell that Ecotech screwed you with a Gen1 Radion. You thought it would be the greatest thing ever because that's how they promoted it. You found out the hard way that it isn't the case.
I've adapted my led layout multiple times since I started using them, and they have gotten better each time. They now work just as well as my old MH/T5 setup, and this is over many months of tracking and growth watching.
If you want to be successful with leds right now, you have to be willing to adopt a DIY approach, otherwise MH/T5 is the best option. Us DIY users are the ones providing all the R&D to these companies. Half the time, they end up coming out with similar layouts a year later after DIY led users implement them. Watch how 430nm leds will start sneaking their way into fixtures.