Chemistry is knowing diesel and kerosene are practically the same thing and can be interchangeable in a pinch, chemistry is understanding how phthalates in plastics, soaps and other things can behave as synthetic estrogen in the human body, chemistry is knowing which solvent to use in a clogged pipe so as not to damage the pipe, chemistry is understanding the weight and density of materials intuitively, chemistry is knowing how and why rust from old iron is the handiest resource grandpa had available to him to use in protecting The wood of his barn. Chemiatry is understanding why single celled life will always die in contact with silver, copper, or tannins, and sometimes alcohol even though they can develop resistances to antibacterial drugs. A simple example of why the naturally darkest bourbon you can buy is a vital survival good. Understanding PH and acid/base reactions will keep you from low key poisoning yourself or toxifying your blood and is the basis for probably half of all medical interventions. Understanding why copper bracelets aren't magically gonna improve your balance or make you healthier but copper lined socks will reduce foot stink, chemistry is understanding why you should always be skeptical of "wonder materials" like nonstick surfaces and synthetic fabrics, chemistry is understanding why salting roads and sidewalks is a good idea ahead of a winter storm this is commonly the difference maker between having a heart attack and not in middle age and older. Understanding chemistry is the difference between falling for a trendy product like a swamp cooler and knowing the use case for one. I could genuinely keep this up all day with random examples. Chemistry is a huge part of daily life, from understanding catalyzers, PH, oxidation, evaporation, specific density, conductivity, etc. to knowing why half the shit in the supermarket is poisoning you or not making your life easier at all.