Simple weapon proficiency

According to the 2024phb, sorcerers have simple weapon proficiency. No longer restricted to simple weapon proficiency (sorcerer).

So if I pick a great club, why do I have penalty on a sorcerer?

"In the 2024 Player’s Handbook, every class can use every Simple weapon. In its previous iteration, some classes (like Sorcerer, Warlocks, and Wizards) could only use certain Simple weapons (Daggers, Darts, Slings, Quarterstaffs, Light Crossbows). Now, your Wizard can pick up a Greatclub and try to bonk your opponents if you so choose.