I learned how to use ssh tunnels when wanting to bypass a firewall in my university network around 15 years ago, had to change the default port to 443.
Been using it ever since for so much more than just bypassing firewalls.
I use it for proxying general internet traffic (such as from your web browser) using the SOCKS5 proxy described in the article. Combined with FoxyProxy or similar it's nice if you want certain traffic (such as to a certain domain which only allows certain IP blocks) to flow from a certain host based on things like the domain.
Been using it ever since for so much more than just bypassing firewalls.