Don't be a ****. She's no more or less likely to have anxiety, depression or drugs problems in tennis than she is as an accountant, engineer, binman, town planner, professional lego maker, Pokemon trader, chriopodist or translator. Maybe she would rather be an F1 driver. But hey, so would I. She has the talent for tennis and would 100% categorically be more regretful if she humped off and left the sport now instead of sticking with it and potentially wishing she had never picked up a racket.