I agree up to a point, but in a survival situation you can afford as many delays as you want. A minimalist equippment can help to keep a situation from getting critical. The extra weight doesnīt really hurt. My PSk and FAK each weigh a little less than half a pound and not having them wouldnīt make me much faster (if it would I could still leave them behind). I prefer having it and not needing it to needing it and not having it anytime.
As you said, it depends on the situation whether you should try to get out on your own or wait for a search party. When you should wait, itīs too late to assemble your kit.
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If it isnīt broken, it doesnīt have enough features yet.