It's not wrong to work with modern languages, but don't pretend that you have the answer to the debate if you don't work in a field where it applies.

Linting bash/perl is a TERRIBLE idea. Consider the following, extremely common piece of code (perl has equivalent syntax as well):

#!/bin/bash

cat > testfile < < EOF
    test1
	test2
EOF

(lol lemmy bug found, can't write the actual "left angled bracket - left angled bracket" syntax, it somehow truncates the comment)

OTOH if you use a modern auto-formattable language, then you can auto-format to tabs with a git hook or IDE plugin (and back for committing) if you want, so the debate doesn't matter in that case. It goes both ways.