If one had to choose which option to use (which implies conscious decision-making), too many options might be a hindering factor; but if one instinctively takes the correct action -- without "choosing" -- then I don't think it applies.
Since one "fights like one trains," the more varied the training, up to a point, the more varied and appropriate the fighting method(s) will be. To a man who has only ever used a hammer, the only response to any problem will be to pound it; but someone who has regularly used all the tools in a tool bag will be more likely to grab the best tool for the job when the time comes.
Yours in Budo,
---Brian---