Scale box for Graph Editor

Start to dealing with animation in Blender and struggle a bit because of lack of some pretty basic tool. One of them is a “Box Scaling Tool” i describe here what it supposed to do with a little mockup: https://blender.community/c/rightclickselect/Y7qO/?sorting=hot
I hope it will gain some up votes and will be implemented, cause i dunno, i cant see any reason someone can really dislike such helpful tool for Graph Editor