Sometimes people have speech at some times, but not others.
Sometimes people have very fluid fluent speech sometimes, and choppy forced slow speech at other times.
Sometimes when people can’t speak, or have trouble speaking, it’s because something is wrong. Sometimes it’s because they’re stressed, or overloaded, or forgot how because they’re frozen and need help getting unfrozen. Or because they’ve pushed themselves too far and are just too exhausted to function.
But losing speech, or losing fluent speech, is not always like that. Being in a mode where speech is difficult or impossible is not always a sign that something is going wrong. For some people, that’s just a mode they can be in, sometimes.
It can mean they are prioritizing different things, putting more resources into thinking rather than speaking. It can mean they are in a more sensory mode rather than a WORDS WORDS WORDS mode. It can mean they’re interacting, and that it’s about presence and not conversation. Or any number of other things.
To make a somewhat flawed analogy: People don’t usually speak during movies. When people aren’t speaking during movies, it’s not because something is wrong. It’s because they’re doing a different thing.
It’s important to know that both of these things exist. That sometimes lack of speech or difficult speech means something is wrong, but sometimes it means something is right.