I think you're taking his statment the wrong way. Issues like this are being blamed on Inart, but you wouldnt know it's a design flaw unless it happened to a certain frequency. If you release x product and only 1% fail, that's just normal failure rate. The reverse of 'mine failed, so the design must be bad' is equally a bad premise under similar conditions. It's obviously happening, so the next step is to figure out if it's user error.
A certain number of take out coffee cups fail and leak. Is that a design flaw?...maybe, maybe not. I'd like to see them add an optional crotch grabber for those that want piece of mind. That would solve it for everyone. Maybe a flat metal base that goes under the normal stand with an arm that has a crotch grabber on it would work. That way you can still use the original stand. Or they could offer an added extension that clips behind the stand with the grabber on it.
I haven't had any issues with my magnetic stands from Inart. Although, my Infinite statues magnetic stands do feel much stronger.