Is a defendant's need for money relevant to prove motive in a robbery case?

"Appellant concedes that a defendant's need for money may be relevant to show motive in a robbery case. Appellant also concedes if a defendant has a drug habit which requires expenditures beyond his means, then such evidence is logically relevant to prove motive under Evidence Code section 1101. (People v. Perez (1974) 42 Cal.App.3d 760, 767-768 [117 Cal.Rptr. 195].)" (Id. at p. 362, 184 Cal.Rptr. 186.)

However, the court concluded: