Who is more of a failure? The undercapitalized trader who lost his entire $2,000 account, or the seasoned trader who lost $2,000 out of her $100,000 account?
I think when people focus too much on failed undercapitalized traders, they are missing the bigger picture.
Both traders, with my understanding so far, took equal risk. It's just one has more to lose while the other has to take a break flipping burgers for a while before continuing to trade again.
The article the OP posted may say the undercapitalized player is being too aggressive, but I say that player is just being as aggressive as the player with the larger pile of chips.
Comparing trading to poker is misleading. If the name of the trading game is to simply keep trading, then by all means risking the entire undercapitalized account is the wrong thing to do. But if the name of the trading game is to make money, which it is, then the right thing to do is make trades that make money, which means risking large portions of the account if the account is small.
Undercapitalized just means it takes longer to earn rewards. Nothing more.