Some people are just naturally introverted or shy, which makes it hard for them to engage in conversations. They might feel anxious or uncomfortable around large groups of people and prefer to be alone or with a few close friends. This can make social situations quite challenging for them, as they might struggle to start a conversation or keep one going.

Some people might have had bad experiences in the past that make them hesitant to talk to others. If they've been misunderstood, judged, or rejected before, they might be scared to open up again. This fear can lead them to avoid conversations altogether, which only makes it harder for them to connect with people in the future.

Sometimes, people just don't find common ground with others, which makes conversation difficult. If they can't find topics that interest both parties, the conversation might feel forced or superficial. In such cases, they might choose to speak only when necessary, preferring to spend their time on activities that they find more rewarding.

With the rise of digital communication, some people find it easier to express themselves through writing rather than speaking. They might prefer texting or emailing because it gives them more time to think about what to say. For these individuals, face-to-face conversations can seem daunting or even unnecessary.