This site is actually misleading in my opinion; someone with no prior exposure might think postgresql users are obligated to spend their time in endless configuration push ups. That is definitely not the case. As the parent points out, developers rarely have to change more than a few things. Production means real loads and real loads drive administrators to configure and tune, but that's as true for MySQL/MariaDB as it is for Postgresql.

Over here[1] you can read about the 1163 snake cased MariaDB variables if you want... 231 of them are specific to innodb alone.

[1] https://mariadb.com/kb/en/server-system-variables/