How safe is Tijuana for a day trip?

Is it safe to walk across the border for the day?

I have not been to Tijuana since the late 80s/early 90s when I was a minor. We will be in Southern California next month and I was thinking of walking across the border into Tijuana with my family (6 adults-husband and myself, 2 adult children and their SO’s). My adult children are reluctant to go due to what they have read themselves.

Thank you for any input!