Weights have limited uses. If you just need a branch to go straight down it's OK.
If you need to put other bends (upward or sideways) in the branch it won't help.
If you need to move a branch sideways or anything other than straight down weights won't help.
If you need to bend close to the trunk it won't help.
It may be difficult to limit how far down the branch is pulled.
Weights can have limited use. If it achieves the outcome you want then use it. I find regular wiring way more flexible and useful.