"miksipä" meaning in Finnish

{
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "adverb form"
      },
      "expansion": "miksipä",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Let's have pizza for lunch. — Yes, why not?",
          "text": "Syötäisiinkö pitsaa lounaaksi? — Niin, miksipä ei?",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "with enclitic-pä",
          "word": "miksi"
        }
      ],
      "glosses": [
        "form of miksi (with enclitic-pä)"
      ],
      "id": "en-miksipä-fi-adv-aNJQ8V~y",
      "links": [
        [
          "miksi",
          "miksi#Finnish"
        ],
        [
          "-pä",
          "-pä#Finnish"
        ]
      ],
      "tags": [
        "form-of"
      ]
    }
  ],
  "word": "miksipä"
}

{
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "adverb form"
      },
      "expansion": "miksipä",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Finnish adverb forms",
        "Finnish entries with incorrect language header",
        "Finnish non-lemma forms",
        "Finnish terms with usage examples"
      ],
      "examples": [
        {
          "english": "Let's have pizza for lunch. — Yes, why not?",
          "text": "Syötäisiinkö pitsaa lounaaksi? — Niin, miksipä ei?",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "with enclitic-pä",
          "word": "miksi"
        }
      ],
      "glosses": [
        "form of miksi (with enclitic-pä)"
      ],
      "links": [
        [
          "miksi",
          "miksi#Finnish"
        ],
        [
          "-pä",
          "-pä#Finnish"
        ]
      ],
      "tags": [
        "form-of"
      ]
    }
  ],
  "word": "miksipä"
}