This is all true - and WoW's gearing curve is much steeper than XIV's - but it's not THAT bad.
You could literally have never played WoW before, sub today, and be doing heroic raids and +15 without anyone's help and without binging hardcore. (Well, it's a LOT easier as a tank or healer.) And they missed what...like 800 weeks of farming? So no, you're not going to die by missing one week.