Yeah, because developers now know they are on-the-hook for accuracy of facade design and the shape of structures (e.g., Hotel Commonwealth mandated re-do 10+ yrs ago), but they are essentially unaccountable for how the green stuff ultimately ends up looking. So they pepper their renders with beautiful, lush, aesthetically pleasing green stuff as an easy way out to sell the design. I am NOT saying landscape design isn't important - it absolutely is. But when a developer makes a half-assed effort to plant some trees or gardens, then then they die a year later, there's nothing much the city can do. Whereas there's no hiding behind the shape of your building.
I agree with you that a monolithically-lined street with nice trees in the middle does not count as activating the street for humans. That said, I generally really like 121 seaport but wish they did more with that corridor.
I've often wondered why the "green stuff" on renders rarely translates to reality. Sorry if this is off-topic, but why aren't developers on the hook for the landscape?