Is a sterilizer really needed and why?

I think it really depends on individual. My personal experience, my son has yet to fall sick other than the cause of his injection. Friends around me who doesnt have sterilizer their baby fell sick quite often — every 1-2month. Also for hygiene purpose as babies tend to get sick easily especially if its sick season. U could always use hot water to sterilize but ofc its better if u use it with glass bottle instead of plastic☺️ If u cant afford it, its not a need but its nice to have to save time as it also helps dry ur bottles!