No one needs to be pious. You can be deeply faithful if you like, but making a show of your faithfulness is hypocritical and obnoxious.
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Let me add that it is possible to be deeply religious without being ostentatious about it, and hence, it is possible to be pious without necessarily being obnoxious, but I certainly agree that no one is obligated to be pious. Piety is optional.
the boy is pious
The priest was a pious man who believed in divine will.The nun was not fooled by the pious expressions on the faces of the mischievous children.
He is a pious man. She is a pious woman.
Bolesław the Pious was born in 1224.
He is pious, or believing in many religions.
The word "pious" is syllabified as pi-ous.
Farshad Pious was born on 1962-01-12.
Henry II the Pious was born in 1207.
Sulpitius the Pious died on 646-01-17.
Bolesław the Pious died on 1279-04-14.
She prayed fervently every day, demonstrating her pious devotion to her faith.
Henry IV the Pious was born on March 16, 1473.