The robust CC->UC,CSU transfer pathway (and associated programs like ADT and TAG) is intended in part to make it easier for lower SES and nontraditional students to attend and afford college, but definitely does not exclude those who do not fit into these categories. Although many higher SES students start UC or CSU as frosh, many do start at CC to take the transfer pathway. Some of the high volume CCs in terms of feeding transfer students into UC and CSU are in high SES areas.
(But they need to fix ASSIST.org)