looks like it says the same thing. "The first is the default system of “soft-lock” targeting which essentially assists the player in aiming attacks and projectiles provided they have their reticle aimed reasonably closely to an enemy player or monster. Allow your reticle to stray too far away from your target, and your attacks will miss altogether. The second targeting system is similar to “tab-targeting”, this allows you to focus a specific enemy within a group to manually specify the target of your attacks. An important note with this system is that you are still required to aim your attacks towards your target. The tab locking simply exists to help you specify which enemy out of a crowd of multiple targets is the focus of your attacks."
similar to “tab-targeting”
Yes there's tab targeting of a sorts, it doesn't make it hard-lock. You can't have both soft and hard lock unless one is optional, in which case it would make no sense to invest in both types. Don't use the term hard lock, as you yourself quoted how it is indeed not hard-locked
Unless you want to try and find a definition of the two, these are what they mean:
Soft lock - you have to aim at your opponent, or in its general direction. (I'm not sure if optional tab targeting + aiming is included in the definition or not)
Hard lock - tab targeting is the only way to cycle through what opponent you want to attack, there is no aiming involved whatsoever
I think the point is that there's no such thing as hard-lock targeting in ESO, despite there being a tab targeting system (which again doesn't mean you don't have to aim - if I don't say that every time, someone will tear me apart for it).