I touched on that in my inebriated rant. It's possible to use a VPN for security purposes, but that's not how people use it. I'm kinda annoyed that VPNs market themselves as security solutions and pretend that they're protecting your data.
Nobody cares what your IP address is. No hacker is sitting there, monitoring the forum, waiting to see if someone posts their IP address in a code block while asking for help.
Here, this is my public IP address:
2001:5b0:50cc:5278:9fec:8f31:2c78:6103
I use a VPN. I use it to access things I'd otherwise be unable to access due to geolocking. I also use it to test things. I also use it so that I can appear to be somewhere other than where I am for a small bit of privacy that's limited mostly to site owners. Google and government agencies know who I am regardless of what IP addresses I'm using.