--quiet doesn't seem to affect output

[rhclayto]

/opt/prometheus/exporters/wireguard/wireguard_exporter --quiet --listen-address="127.0.0.1" --listen-port="9586"
/opt/prometheus/exporters/wireguard/wireguard_exporter -q --listen-address="127.0.0.1" --listen-port="9586"
/opt/prometheus/exporters/wireguard/wireguard_exporter -qq --listen-address="127.0.0.1" --listen-port="9586"
/opt/prometheus/exporters/wireguard/wireguard_exporter -qqq --listen-address="127.0.0.1" --listen-port="9586"

With all variations, in the logs I get repeated every 5 seconds:

Dec 31 13:11:23 gateway prometheus-wireguard[8170]: 2024-12-31T13:11:23.878113Z INFO wireguard_exporter: Collecting metrics...

Am I doing it wrong?