To be fair, you can click Advanced > Continue to something or other to bypass the SSL warning.
I think.
I think.
So this is where the "cheat code" comes in handy:
https://subdomain.preloaded-hsts.badssl.com/
https://pinning-test.badssl.com/
Then there are those which have no "cheat code" bypass, so you'd have to use some other method: