Doctor probably wants more IBS patients.
https://pubmed.ncbi.nlm.nih.gov/36623926/
Antibiotic use as a risk factor for inflammatory bowel disease across the ages: a population-based cohort study
Conclusion: Antibiotic exposure is associated with an increased risk of IBD, and was highest among individuals aged 40 years and older. This risk increased with cumulative antibiotic exposure, with antibiotics targeting gastrointestinal pathogens and within 1-2 years after antibiotic exposure.