Why use UDP scanning over TCP ?

Hey, i’m new to cybersecurity, and after doing some research there is something I can’t seem to understand :
My understanding is that UDP scanning is slower than TCP since it identifies open ports by not receiving any messages (whereas closed ports would be identified if the port responds with « unreachable »).
However, it cannot differenciate between filtered and open since both would lead to a non-response.

TCP on the other hand, can quickly see if a port is …

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