I tell my friends the same thing as you explain OP. Í'm currently in the process of perfecting the skill called "survival". I'm mostly doing this on Jayce and Lulu, since they have the poke to stay out of firing range (most of the time) and my tanky supports/junglers go in with the intention to cause panic and death, so the risk increases.
I'm ending most of my winning matches with LULU with 1 death. I tell my teammates to take it slow and not give away kills early, in the context that if you survive, your opponents will get impatient and start offering you their lifes. I often face ADC or any Carry that wants to go in and start a brawl, inevitibly dying. They're not built to survive and they don't have the mental capacity to think of surviving as a primary objective.
We had a Tryndamere last time. He went in solo, versus 5, made one kill and died. When I asked him not to do this, he told me he was the one carrying this game, because, look at my(trynd) kills. I told him to look at his kill/death ratio and that a 1v1 exchange is only worth it if you get a shutdown.
In my experience, you either have the power to dominate early lane, or you do not.When you recognize that you do not, your aim should be survival.Farm, farm farm. If you can't farm due to being forced to your tower, make sure your support gets the last hits instead. In fact, I've often had to solo bottom lane about 50% of the time, due to the constant up and down teleporting of my carries (low hp).
I'm not level 30 yet, but I'm absolutely certain that the key to victory is either in100% early lane dominance, or in not giving away kills to your opponents and duking it out in the teamfights. And wards, of course.