Exactly! Each additional channel you add to the marketing mix helps increase the efficiency of the previous channel!
1. You do organic
2. Add paid with exact intent, your organic will look better
3. Add YouTube for retargeting or targeting with shorts, your organic and paid will look better
4. LinkedIn.. you get it
5. Meta .. same story
What I would suggest is though, keep an eye on the costs and optimize them because platforms love money and will try to squeeze that CPA out of you.