Why the site type be restricted?

[GabrielDrapor]

in layouts/_defult/list.html

{{ partial "header.html" . }}
<h2 class="c-title p-tag-title">{{ .Title }}</h2>
{{ range $index, $page := (.Paginate (where .Site.RegularPages "Type" "posts")).Pages }}
{{ if ne $index 0 }}
{{ end }}
{{ .Render "li" }}
{{ end }}
{{ partial "pagination.html" .Paginator }}
{{ partial "siteinfo.html" . }}
{{ partial "footer.html" . }}

why not change it to

{{ partial "header.html" . }}
<h2 class="c-title p-tag-title">{{ .Title }}</h2>
{{ range $index, $page := .Pages }}
{{ if ne $index 0 }}
{{ end }}
{{ .Render "li" }}
{{ end }}
{{ partial "pagination.html" .Paginator }}
{{ partial "siteinfo.html" . }}
{{ partial "footer.html" . }}

for avoiding problems when having multi sections?