Are All Default System Certificates in Keychain really valid ?

At least that's what it's showing me on a new brand new MacOS Sequoia, Mac Mini M2

Let me share 2 Certificates from my System Keychain, that are making me doubt that to be the case.

1) The very first one. AAA Certificate

It has 2 'http' links. That seems dangerous.

Now if I click on the first one, it opens a popup (2nd attachment), and

If I click on the second link within this certificate, it cannot find the page (3rd attachment)

1st link

2nd link

2) D-Trust Root Certificate

This certificate it also shows as valid in the Keychain App, although part of the link itself says something about revocation.

Clicking on this certificate link opens a popup (shown in picture)

Hoping someone could share some light here because I wonder what the repercussions could be. Top of my head is some sort of man in the middle attack.

But I'm hoping I'm just over analysing it. After all, It's a brand new install on a brand new Mac Mini and people tells me Mac don't get hacked.... or not yet maybe.