Why B2B lead scoring consumes a lot of time?

When any of your leads gets a high score it stays in the tracking system even if the person is quiet for a long time. Just because this lead gets a good score does not mean this lead will convert. As this lead is quiet and your sales team is still calling or emailing them, they might be investing efforts in the wrong direction. 

The better approach is when your sales team will focus on the other valuable leads which are in the sales funnel. If the same leads come in the future and the team sees the potential here by verifying their lead score, approaching them at that time is better. 

This is how you can sort the list of your leads and keep the active leads on the top.