Generally speaking, I think you're right. Herbs and spices are safe. But I wanted to add a caveat: caution is always a good idea. You could damage organs like the liver or kidneys, specially if you have an issue with them.

For example, too much turmeric can result in liver damage: https://www.jeffersonhealth.org/your-health/living-well/the-trouble-with-turmeric-associated-liver-injuries

Another example: Rooibos tea is awesome but there's this guy who drank a bit too much, and ended with liver failure: https://pmc.ncbi.nlm.nih.gov/articles/PMC4435260/#B4 There are more reports of hepatoxicity here: https://www.mskcc.org/cancer-care/integrative-medicine/herbs/rooibos-tea