This is like the difference between an orange and fruit juice. You can squeeze an orange to extract its juices, but that is not the only thing you can do with it, nor is it the only way to make fruit juice.
I use tree-sitter for developing a custom programming language, you still need an extra step to get from CST to AST, but the overall DevEx is much quicker that hand-rolling the parser.
I use tree-sitter for developing a custom programming language, you still need an extra step to get from CST to AST, but the overall DevEx is much quicker that hand-rolling the parser.