Pointlessly

Even if we wear an Armani suite or drive a Jaguar, in the end we're the same as ants. We move and move pointlessly and then we die.

Instead of sitting there and hypothesizing pointlessly like the bunch of armchair theorists you are, why not go out and do some actual research for a change?

He sat there, pointlessly tossing the ball into the air and letting it fall, over and over.

[…]as a result of which, the two scenarios in which the Harwich Force caught up with the battle while it was still going on were considered and brought forward into the main timeline, as it meant that both sides' light screening forces actually got to do something other than die pointlessly.