Pulling a cube and not being able to do anything does happen in the game. Hopefully you pulled a cube that will help you in a future turn.
A cube is only worth about 1/3 VP.
A regular move should be worth ~ 2 VP...
I have taken the market day cube first thing in a turn to make it much harder for someone to sell goods a the market and claim a customer tile. I had no goods of my own, so I was pulling a cube for no immediate benefit of my own.
This was probably a really bad move unless you manage to sell 2 goods on the next market day.
This blocking move cost you ~ 2 VP and it doesn't hurt the others.
If other players trigger the marked day this is one of the best things that can happen!
It saves you moves! You just have to manage that you're able to sell something in advance.