I think this is an unfair comment. Weby templates are a different approach to Jinja (which is a conventional templating language) and its like comparing apples and oranges.

Automatically generating HTML from code has many advantages (and some huge disadvantages) compared conventional templating but has been used as far back as Perl's CGI.pm with many different lisp libraries also doing the same.

If you have never used such a library I'd recommend giving it a try sometime - they're very nice in situations such as automatically generating forms or database search results (where conventional templating gets challenged) which have more display logic than HTML.