Why not bet on a Lommel win only?

Because their attack remains timid (one goal in their first two matches) and Konadu has just arrived. The double chance covers the draw, which is more prudent than a bet on a winner that hasn't proven much yet.

Westerlo is bottom, why not go all-in against them?

The early-season league table doesn't mean much. What speaks is their defense conceding heavily and their absentees at the back, not a position on a still almost-empty standings sheet.