Violence is not inherent to personal ownership. In society with a concept of ownership, if I find that you stole from me, the consequence might simply be that I'm no longer your friend and won't help you when you need it. Ownership is a concept that means I think you shouldn't take what I own, but it does not specify any practical consequences to that "should not". Indeed, there may be no tangible consequences - to say that there must be would be to deny the is/ought gap.

This is the problem with phrasing criticisms in such obtuse, "gotcha" ways as in the OP - the actual point of contention is buried so deep it takes a dozen comments and multiple accusations of bad faith to uncover it.

Obviously since everyone in the target audience knows what happens if you try to take something without paying the price the seller wants, this does not form a necessary part of an explanation to that audience. If you want to draw attention to alleged violence in the concept of ownership, you can just say that directly, and then people who disagree can directly see what you're saying and present their disagreement, and have a more productive discussion. Hope this helps in the future.