Is it safe without index.html file inside some sub folders of t3_bs3_blank?

Hi...,

I saw in other Joomla standard template (beez3 & protostar) in every folder they have index.html file. As fa as I know, index.html file can prevent direct access to the folder from outside. This is for safety reason. But in some sub folders of t3_bs3_blank there is no index.html file, such as:

\templates\t3_bs3_blank\css\rtl
\templates\t3_bs3_blank\css\rtl\dark
\templates\t3_bs3_blank\css\rtl\red
\templates\t3_bs3_blank\css\themes
\templates\t3_bs3_blank\css\themes\dark
\templates\t3_bs3_blank\css\themes\red
\templates\t3_bs3_blank\etc
\templates\t3_bs3_blank\etc\layout
\templates\t3_bs3_blank\fonts
\templates\t3_bs3_blank\fonts\font-awesome
\templates\t3_bs3_blank\html
\templates\t3_bs3_blank\html\mod_footer
\templates\t3_bs3_blank\images
\templates\t3_bs3_blank\images\demo
\templates\t3_bs3_blank\images\ico
\templates\t3_bs3_blank\images\system
\templates\t3_bs3_blank\images\themes
\templates\t3_bs3_blank\images\themes\dark
\templates\t3_bs3_blank\images\themes\dark\ico
\templates\t3_bs3_blank\js
\templates\t3_bs3_blank\language
\templates\t3_bs3_blank\language\en-GB
\templates\t3_bs3_blank\less
\templates\t3_bs3_blank\less\rtl
\templates\t3_bs3_blank\less\rtl
\templates\t3_bs3_blank\less\themes\dark
\templates\t3_bs3_blank\less\themes\red
\templates\t3_bs3_blank\local
\templates\t3_bs3_blank\tpls
\templates\t3_bs3_blank\tpls\blocks
\templates\t3_bs3_blank\tpls\blocks\mainbody

Is it safe without index.html file inside some sub folders of t3_bs3_blank?

Regards,