But there are many other companies not doing what YC recommends who do just fine and that is the point. Advice is great but be careful what you think it teaches you.
Probabalistic advice is different from deterministic advice in that there are exceptions to the rules. Assuming you are the exception as an excuse to avoid the rules generally results in worse performance rather than better. Avoiding the advice entirely without even trying to comprehend why you are the exception seems to border on certifiable to me.