A lot of great answers have been given already that are correct (havent read them all so I hope I dont repeat something said by someone else without giving credit). I just wanted to add some more information.
Most antibiotics are based upon inhibiting a very specific system/ pathway/ structure/ function/ … without disrupting anything else that might also be present in the host.
Heat/ detergents/ … are very rigid methods that destroy a lot of different pathways/ systems/ structures of the bacteria but would also destroy a lot within the host.
A bacteria can more easily circumvent one particular disruption instead of hundreds at once. It becomes statistically impossible, as usually the rely on numbers and short life cycle to outsmart the 1 disruption made by antibiotics.
Hope this helps clear any questions you might had after reading some comments 🙂
Beinj
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