There are certainly Steem Engine tokens such as the SUFB token (for a share in the damages in the Class Action against Facebook & Google's Crypto Ad Ban that are very serious.

However there is nothing wrong with tokens that aren't so serious and have little real value.

A lot of people mainly use their computers for non-serious things: ie to play games and watch videos.
This doesn't mean that computers are silly.

The ability of anyone and everyone to cheaply, quickly and easily create tokens for any purpose whatsoever is a dramatic and positive economic development. The free market will throw up all sorts of ideas and tokens. Many will fail but some will thrive and change the world.