Is that wrong? No, it is not - and you should.
To simplify the article: if you have a $5 bill in your pocket, and you want to buy a $1.75 candy bar, you give the $5 bill to the cashier and you will get $3.25 back in "Change". Same for bitcoin, an input (a previously received amount of bitcoin) has to be spent completely - even if it was 0.0123 bitcoins - the network threats it like a "bill". From it, the value you want to spend, minus transaction fees, will return bitcoins to a "Change" address in your bitcoin wallet.
The problems described in the article above are due to the litecoin/bitcoin-core random generation of addresses - which forces you to backup your wallet file at almost every transaction... a pain-in-the-as... The reason: the private keys of the main addresses and the change addresses are randomly generated... Therefore, at every dice throw, you need to backup the wallet - because a new private key has been generated!
If you select a HD wallet, like Electrum-ltc, you only have to safely store 12 seed words on a piece of paper (for normal wallets), or 24 words for Trezor wallets - and that's it. Those seed words can generate infinite Litecoin addresses (not really infinite, only 10 exp 78 addresses - the same amount of atoms in the universe....). No other backups required.