A coach I have worked with previously at Step 4 has just joined the coaching staff of another Step 4 side, after a spell in the Conference and then a few months out of the game. The club reshuffle that brought on this new management team also led to the big name (by that league's standards) centre forward leaving the club. They were left with no recognised CF and struggled to identify the right player. Instead they brought in two very good wingers/attacking midfielders and changed their approach. They won 3 of their first 4 games, moving the club out of the relegation zone. Ergo, while it's nice to have a big No. 9, you can be successful without one.
We do have a CF in Gelhardt, even if he doesn't play quite the same way as Stewart. If anything happens to him, we'll just have to adapt as the team I mentioned above did. I don't see what the fuss is about.