Yes they can be, and gambling is definitely a different psychological mechanism with different financial outcomes than hobbies or collecting.
f2p games and tv shopping network addictions absolutely leave a significant number of people destitute.
There are many other hobbies/forms of entertainment that can easily consume significant resources and leave some % of their userbase in serious financial trouble/ruin their lives.
Also I'm not sure it is correct to define morality by trying to connect how expensive a hobby/form of entertainment to whether it is immoral.
I have heard that boating and aviation have similar financial financial outcomes to gambling. Keep in mind that the majority (way more than 50%) of people can engage with gambling safely, it is a minority that get into trouble