The SO_REUSEPORT socket option

I am just wondering does that really matter? I mean all it matters is that whoever as CPU cycles should pick up the next workload. Now I am not sure why the thread itself picking up the load is actually relevant. The CPU being underutilized seems to solve by itself. I mean if a core is saturated then effectively an extra thread will pick up the next connection and this should work well with what the CPU scheduler is already doing for balancing.