A dictionary describes some common uses. It is not comprehensive or authoritative. It changes with the language, not the other way around. Language defines the dictionary, sometimes with a very long lag. Several people have told you of a definition not present in whatever dictionary you referred to. This is meaningful.

If you were to ask any group of people whether toys are intended for children, the majority would say yes. Do we at least agree on that? If would be more useful for all of us, if we, in discussions, used terms in ways that align with what the majority thinks those terms represent. Because if we don’t, we create confusion. This is unnecessary and just wastes our time.

>> If you were to ask any group of people whether toys are intended for children, the majority would say yes. Do we at least agree on that?

No. This is, in fact, the point of contention here. I've heard ads and people calling boats, cars, tools, new games, and so on toys. A few dictionaries I checked agree. Several people in this very thread have the same opinion.

Well, fine. But as someone who has a lot of experience with people telling me to stop playing video game because I’m not a child anymore (as have many if not most young adult gamers), it seems to me that people who call video games toys just reinforce that narrative, so it‘d help if they didn‘t.