Why does quantum computing need so much cooling if photonic doesn't?

[Falcon]

Someone told me superconducting quantum computers need to be cooled to crazy temperatures but photonic ones don't. Why is cooling such a huge deal? What happens if you don't cool it enough?

[Hollow Tiger]

Quantum states are fragile. The slightest vibration or heat interaction destroys them through decoherence. Superconducting qubits work by maintaining delicate quantum states in electrical circuits. Heat is the enemy because thermal energy causes the qubit to lose its quantum properties