VAR inserts human judgment where none is needed.
Offsides can be determined by sensor technology: Each player could be tagged for location, if the rules were to require comparison of, say, foot positions alone. Sensors in ball and boots could leave VAR "human error" behind: no lines to "interpret"; no worry for angles. It works for goal line tech. Should be doable for offsides.
Players of color earn opportunity with talent on the field, but the coaches, staff and front office aren't as diversified. Staff hiring is the bigger issue, not signing players.