Is this to say that "joint ownership", in which two or more owners unite in owning a given property, is somehow incorrect?

No -- not if it is properly done -- and this is where things can become tricky.

The fact is that property is usually viewed as passive, and entirely subject to the will of the owner.

The will is invariably singular.  You do not have two minds - you can only have one.  Likewise, you cannot have two different people both in total control of a single property.  As when two people attempt to occupy the same space, it is a physical and moral impossibility.

One one person can be sovereign over themselves and over the property that they own.  This is to say, that only one person can be in a position of exercising ultimate decision-making over themselves and their property extensions, that ultimate decision-making authority being the real hallmark of ownership.

There is nothing incorrect or contradictory in having two or more persons pool their resources as owners of a given property.  However, the inescapable truth is that two or more persons cannot both or all make ultimate decisions concerning that property.

For example, if two partners join in a venture or in the purchase or acquisition of a property, and agree to share that ownership on a fifty-fifty basis, the inescapable fact is that whenever they have a divergence of view, intention, or desire as to the details of use or diposal of the property, they are apt to have a conflict.

However amiable, agreeable, and alike they might be in their personalities, ideas, and goals, it is not possible for two persons to always think alike.

Thus, even if the financial interests of two or more individuals are proportionally the same in a given venture or property are exactly equal, they should still determine at the outset of the arrangement who is going to have the ultimate decision-making authority. 

Failure to make such a provision even under the very best of intentions and among the most agreeable of people is very likely to lead to all manner of difficulties later, at some point.