Rulebook says "You may use either hand to make an attack. Attacks made
using your secondary hand suffer a –20 penalty to any
applicable Test. "

Thats for attack. Rolling defense is not an attack roll, why do people say shield is -20 penalty?

Its also logical. An untrained guy/girl could pick up a shield and sword, he/she would be better at defending then using a blade alone (many think its the same by rules, but even by rules shield is +10 better in defensive with no talents

Rulebook says "You may use either hand to make an attack. Attacks made
using your secondary hand suffer a –20 penalty to any
applicable Test. "

Thats for attack. Rolling defense is not an attack roll, why do people say shield is -20 penalty?