Can anyone explain to me why every spike in showdowns uses Pyro

Spy PSA: Stop playing Pyro. : r/tf2

There's an Entire Industry Dedicated to Making Foods Crispy, and

CapRadio Caldor Fire Investigation

Russia and Ukraine launch swarm of drones at each other's

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Russia attacks Ukrainian electrical power facilities, including

What do people think of this idea for a pyro melee? : r/tf2

Can Anyone please help me with tips on how to get spike to r 25 he