Is the word GAMING only for computer games e.g. Fortnite or can you also say if you are playing a mobile phone game that you are gambling. Because actually you only say gamble when you play things on the pc or
In the past, people thought of games of chance when gambling, mostly for money. Hence "he gambled himself away". Computer games came later.
By the way, the word is of Yiddish origin, i.e. A Hebrew word stem that was used by German Jews in their language and that is how it came to Germany
https://de.wiktionary.org/w/index.php?title=%D7%A6%D7%95%D6%B9%D7%A7%D7%A2%D7%9F&action=edit&redlink=1 (https://de.wiktionary.org/wiki/Hilfe:YIVO: tsoken)
https://de.wiktionary.org/wiki/zocken