Were the tires wearing more on the outside edges? Perfect camber would be zero, right in the middle of the spec. Zero is perfectly vertical. Both at 1 degree would be leaning out that small amount. Each is pulling against each other so it still goes straight. Some tires may tolerate the camber better than others. Heavy vehicle may not be as forgiving.
Toe looks good. Slight in as shown is good. The idea is that when at speed the suspension is loaded a bit and wheels are pushed back just slightly and should dynamically be at zero and both be pointed straight and parallel forward.
And yes I was certified 35 years ago. Old school with levels and bubbles, no electronics.