They had replaced a lot of them already. Kraft's most iconic product (Mac & Cheese) replaced the artificial dyes years ago and this is only the last 10% of their products.
Are artificial dyes actually bad for you?
The fact that this is a legitimate question is very concerning. Some of these dyes are/were ubiquitous and there is very little research about them. IIRC a few have evidence of harm. Nothing should be this widely deployed without understanding them more.
If you were more questioning "Is natural actually better for people or just a nice sounding word" which could also be implied by your question, I agree with that, with the caveat that artificial stuff has more potential for surprises since it doesn't have the history of being used safely "natural" stuff does, and should have a higher bar of research.
People act like taking the food dye out of gushers is suddenly going to fix their problems. You need to avoid this food in the first place.