Some companies give stock as a primary benefit. Some of those companies may provide stock in lieu of some or all of a salary. That doesn't mean it's necessary valuable - they typically give you some amount of stock equal to a part of your salary (or some other normal monetary amount), and you would be hopeful the value increases substantially over time.
Just the fact that the other person has stock from their time being employed by Disney is no indicator of their wealth. You can own partial stock as well. It could be worth $50. We don't know.
I don't think it's fair to publicly show off and simultaneously lightly insult other people (the original post, unless it's ironic and I'm missing the joke, is trying to make such a point) but then not expect any sort of a response. These aren't people just minding their business. These appear to be extremely over confident people who crave public attention, and they (or their friends) are willing to put others down in the process.
I don't think they need to be defended.