Let's say someone is comfortable enough with BI in their twenties, and never bother to get a substantial ("real") job. Are they effectively stuck that way for l

Let's say someone is comfortable enough with BI in their twenties, and never bother to get a substantial ("real") job. Are they effectively stuck that way for life? Older, with no work experience, and maybe having children, are they really going to be able to launch a career from scratch?