You can be free of stress

If you're insecure, you might be less insecure if you don't date (depends?)

You can listen to single songs and relate to them (If you want)

You can be peacefully flirted with without your partner trying to attack/harass the person who flirted

You can also be more yourself, like, no need to worry about what a partner wants, needed, etc.

More time with your friends, your bed is all yours

You can leave, go anywhere you want without them getting depressed

You can feel more power over yourself.