Why a!gridfieldColumn doesnt support mutiple tag fields in value we use a!tagField

Why do you need multiple tag fields when you can use multiple tag item.

{
  a!localVariables(
    local!selectedId,
    local!employees: {
      a!map(
        id: 11,
        name: "Elizabeth Ward",
        dept: "Engineering",
        role: "Senior Engineer",
        team: "Front-End Components",
        pto: 15,
        startDate: today() - 500
      ),
      a!map(
        id: 22,
        name: "Michael Johnson",
        dept: "Finance",
        role: "Payroll Manager",
        team: "Accounts Payable",
        pto: 2,
        startDate: today() - 100
      ),
      a!map(
        id: 33,
        name: "John Smith",
        dept: "Engineering",
        role: "Quality Engineer",
        team: "User Acceptance Testing",
        pto: 5,
        startDate: today() - 1000
      ),
      a!map(
        id: 44,
        name: "Diana Hellstrom",
        dept: "Engineering",
        role: "UX Designer",
        team: "User Experience",
        pto: 49,
        startDate: today() - 1200
      ),
      a!map(
        id: 55,
        name: "Francois Morin",
        dept: "Sales",
        role: "Account Executive",
        team: "Commercial North America",
        pto: 15,
        startDate: today() - 700
      ),
      a!map(
        id: 66,
        name: "Maya Kapoor",
        dept: "Sales",
        role: "Regional Director",
        team: "Front-End Components",
        pto: 15,
        startDate: today() - 1400
      ),
      a!map(
        id: 77,
        name: "Anthony Wu",
        dept: "Human Resources",
        role: "Benefits Coordinator",
        team: "Accounts Payable",
        pto: 2,
        startDate: today() - 300
      )
    },
    {
      a!gridField(
        /* Replace the dummy data with a query, rule, or function that returns a datasubset and uses fv!pagingInfo as the paging configuration. */
        data: todatasubset(local!employees, fv!pagingInfo),
        columns: {
          a!gridColumn(
            label: "Name",
            value: a!linkField(
              links: {
                a!dynamicLink(
                  label: fv!row.name,
                  value: fv!row.id,
                  saveInto: local!selectedId
                )
              }
            )
          ),
          a!gridColumn(label: "Role", value: fv!row.role),
          a!gridColumn(label: "Department", value: fv!row.dept),
          a!gridColumn(
            value: a!tagField(
              tags: {
                a!tagItem(text: "test"),
                a!tagItem(text: "test2")
              }
            )
          )
        },
        pageSize: 7,
        rowHeader: 1
      ),
      
    }
  )
}