Sintering is useless, prove me wrong.

I had the option to get the 4th perk for furnaces and I passed it up. Thought to myself, sintering is useless, why would anyone choose this? Gravel is the easiest resource to get in the game, you get tons of it just mining other crap. At the end of the season I just dump all my gravel/glass/bricks because I know I’m not going to transfer them to the next season. So I honestly think them using more materials is better so I don’t have as much crap left at the end of the season.