Would porcelain veneers be a better option for someone with weak teeth?

Not necessarily.: "weak teeth" can have differing meanings. Evaluation by a dentist is best to determine if veneers are recommended, or if there is a better alternative.

It depends: It really depends on the cause of the weak teeth, are they decayed or brocken or restored before in any way ? Or they are just extra sensitive. Veneers are normally recommended to improve the smile , cover teeth with multiple restorations like fillings and bondings or to cover deeply stained or discolored teeth.

Protection: Veneers can protect and strengthen your teeth with minimal tooth structure removed.

Yes: If the weakness of your teeth is on the front surface or between the teeth porcelain veneers may be your answer, especially for front teeth. If it is the entire exposed surface of your teeth or back teeth then porcelain crowns can protect the remaining tooth structure. Advanced training is mandatory if your entire mouth is concerned.