LiveView function component assigns

Hello,
I’m new to Pheonix and Liveview and I was following some tutorials on LiveView. There I found this code.

def day(%{index: index, current_path: current_path, date: date, time_zone time_zone} = assigns) do
    date_path = build_path(current_path, %{date: date})
    disabled = Timex.compare(date, Timex.today(time_zone)) == -1
    weekday = Timex.weekday(date, :monday)

    class =
      class_list([
        {"grid-column-#{weekday}", index == 0},
        {"content-center w-10 h-10 rounded-full justify-center items-center flex", true},
        {"bg-blue-50 text-blue-600 font-bold hover:bg-blue-200", not disabled},
        {"text-gray-200 cursor-default pointer-events-none", disabled}
      ])

    assigns =
      assigns
      |> assign(disabled: disabled)
      |> assign(:text, Timex.format!(date, "{D}"))
      |> assign(:date_path, date_path)
      |> assign(:class, class)

    ~H"""
    <%= live_patch to: @date_path, class: @class, disabled: @disabled do %>
      <%= @text %>
    <% end %>
    """
  end

In here author assigned every new value that he uses in the template to “assigns” variable. I did it without assigning them and it worked.

~H"""
  <%= live_patch to: date_path, class: class, disabled: disabled do %>
    <%= text %>
  <% end %>
"""

without assigning these values can cause any difference? Is assigning them considered good practice or it’s preference?