I vote NO. I have been playing since beta and I have never been to the Lighthouse. Got close but not enough. I have never shied away from Crucible or any PvP but still no lighthouse. Then again to be fair I tried forming a team seriously for the first month Trials was available but since then I havent really tried. From time to time I join a team and jump in there but never religiously.
I have three friends who just started playing Destiny on year two. When they got to a decent light level they started doing Trials together and only after a month or so they have been to the lighthouse multiple of times.
If they let people who never got flawless into the Lighthouse simply because of the time spent on crucible, it would ruin it. I mean rightnow with the amount of carries (and cheating) going around it actually already the "prestige" it should've had. I am against carries to lighthouse let alone another free ride. Gear on Destiny is never really earned and Trials was the only place to truly get Earned gear but even that is ruined now.