Hence my issue with this: If you need to use (1) "life is meaningless" as a stepping stone to (2) "therefore, life has whatever meaning you give it", you've already agreed to that constraint by default. I'm sure it helps a lot of people get from (1) to (2), but better still is to realize (2) is in a sense _deeper_ than (1) and you can just throw out (1) once you have (2) locked down enough in your psyche.
But you're still finding meaning in the abyss - you're choosing what to live for.
Which is great!
Most people can't get there. They stare into the abyss, and run screaming back to some false comfort.