What about things that don't really have a replacement like housing, medical insurance, child care costs etc?
Adding housing maintenance, heating, water supply, etc. - the entire housing category climbs up to 17.8%. Which sounds like a totally reasonable estimate to me - young people and urbanites pay more, older folks and people in rural or provincial towns pay much less. From my personal experience - housing and related expenses were ~50% of my income while paying down mortgage, down to ~7% after the loan was repaid
The CPI doesn’t reflect your personal preferences. It’s an average across the entire country. Have you ever known the entire country to agree on anything?