It depends on what you consider long. 20 minutes walk to town maybe. That's all. I would consider that a short walk myself. We walked from Mata Rocks to town twice a day every day during our stay and did not find it tiring or difficult, just very pleasant and relatively quick. We walk 15 minutes every day just to catch our train into town and then 15 to 20 minutes at the other end. Seems fairly normal as far as we are concerned. Obviously if you have a disability, then it would be different, but any healthy person who finds a 20 minute walk a long one, needs to get out more often.
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