Dimensional restoration is a big part of aerospace maintenance.
A whole lot of aerospace tig welding is restoring worn metal.
And that often involves being able to weld a very small bead on an edge.
The thinner the metal, the more difficult it is so its good to start thick and work your way dow...
The skill of stacking beads uniformly halfway overlapping a previous bead is fundamental to multipass welding on pipe or structural shapes. This is some of the best concentrated stick welding practice there is.