Did it help your LO STTN or did it simply help them go down without your help?

Right now we do give DS a bottle and rock him to sleep but he goes down without any problem and I cherish that time with him. What I don't treasure is the middle of the night wake up we are having. He'll be 6 mo old on Sunday and usually wakes between 2 and 4 and has another bottle (5 oz) before going back to sleep. Its not a comfort thing (I don't think) because he eats the whole bottle but he has also STTN before so I know he can go that long without eating.

I'm obviously not trying to starve my baby but am wondering if sleep training will help his night time sleep or if it simply helps with putting him down? Its not something I necessarily want to do- but am also willing to do if it will help us get longer stretches of sleep out of him.