imo, street photography is, really, environmental photography. you are photography humans, dogs, cats, pigeons, etc in their environment in the same way wildlife photography captures animals in their environment.
for example, a bloke jumping over a puddle is the same as a polar bear jumping over an ice hole; a couple kissing in paris is the same as a couple of pigeons getting smootchy; a girl on fire vs a elephant with its tusks severed
both genres are equally capable of being emotive, evocative, sad, funny, etc. and, the best photographers don’t just look to capture humans or animals in their environment. they make it special.
simple, really.