I completely understand people buying just about anything rather than making it, especially products like stock, pasta, and bread that are simple to make but take more time than a lot of folks have.
Having said that - buying guacamole confounds me, unless you don't have access to avocadoes, need a ton of guac for a party, or have a good Mexican grocer nearby where you can get quality guac. Making guac at home takes maybe five minutes, and it tastes substantially better than store-bought. Like I can get really good bread and pasta from the store, but any guac I could buy near me isn't gonna hold a candle to homemade.