Five days a week is a proper commitment, and it can absolutely work — more sessions means you can give each muscle group its own focused day (the classic "bro split", or a push/pull/legs-plus arrangement). The trap is thinking more days automatically means more muscle. It doesn't; more days means more you have to recover from, and if sleep and food don't keep up, five hard days can stall you instead.
So the real question isn't "is 5 days good" — it's "can I recover from 5 days". This builder structures the split around your goal and experience and lets you track the load, so you can see whether you're actually progressing week to week or just piling up fatigue. Just try it, and be honest with yourself about the sleep and protein (a 5-day week only works if those keep up).