Almost no physical engineering requires licensing either. Most things are YOLO-ed without a licensed engineer because it isn't required and adds little value.
The issue is that software systems are qualitatively more complex than any physical system due to their intrinsic malleability. Physical systems are sufficiently simple that formal verification methods are actually tractable (and used).
Physical products require the CE mark [0], so software systems (especially the complex ones) should be able to meet the same standard because they’re used in places where bugs and glitches can cause harm.
The issue is that software systems are qualitatively more complex than any physical system due to their intrinsic malleability. Physical systems are sufficiently simple that formal verification methods are actually tractable (and used).