As much as there may be an element of 'addiction' in her actions to draw attention upon herself, it's also her sole source of income. She's been a professional Celebrity since her early 20s when the glamour modelling ended. Even her books, perfumes, etc. all rely on her presence in the public...
Unless she's very recently moved, she lives in a house which can only be accessed via the A24, so she *needs* a car (or to move...)
https://www.mirror.co.uk/3am/celebrity-news/katie-prices-mucky-mansion-tv-24821909
(it does say, as at August 2021, that she had been living with family but...