Who "they" are you referring to? The BLS, who computes inflation in the U.S.? According to the CPI Handbook of Methods which is freely viewable to anyone who can be bothered to do a simple web search and take time to read it at https://www.bls.gov/opub/hom/pdf/cpihom.pdf The handbook that starting on page 12 goes into excruciating detail on exactly how rent is included in CPI. And on page 22-24 goes into excruciating detail on how insurance is included?But in rents and insurance, costs rise. They know why they exclude those.
Is that the "they" you refer to? Or is it some made-up group that exists only in your own head.