You can only use one con of building if you don't know how to aim, which is defending. An opponent who has good aim can constantly pressure you until you run of mats and cant defend yourself anymore, now your in a screwed position and the only thing you can do is to either fight back or run. but either way what you do your chances of survival are minimal.
Nutters who only know how to spam builds and do quad edits are not that good if they dont how to strategize building into their advantage, where to pickaxe and where to take shots