Maybe you’re texting one person, but planning a coffee date with another.
It’s not wrong; since you’re not tied down, you’re simply screening a list of potential candidates.
Now, if the person makes it obvious you’re not even close, and will never meet their friends, it’s never going to get serious. Casual daters don’t usually find themselves sighing on a bench, in a garden, fantasizing about a long, lasting future with someone.
The expectation is low, so marriage and family planning aren’t really on the table.
It could also be that you’re having fun, and taking a break from dating, but still want people to do things with. Casual dating doesn’t mean you have to sleep with everyone you talk to.