Sadly, there are plenty housing plans where the developers didn't bother to plant that even those lone trees. They're all easy targets for mass tree planting, and with people actually living on and tending to the property, the survival rate for the new trees go way up compared to planting massive numbers of saplings en masse.
What's kind of surreal is that people aren't doing already planting them on their own. Even if we completely ignore any potential long-term climate benefits from urban/suburban trees, planting trees around your house is basically just a big bundle of benefits with some relatively minor maintenance costs (dealing with leaves if you so choose, pruning, etc.). They increase property values and personal satisfaction, provide shade that makes activities outside more pleasant and can decrease your HVAC bills by shading your house, help control water runoff, decrease urban heat island effects[0], and more.
Street trees (closely lining the street) are even better because they can serve as traffic calming measures. When big tree branches overhang a road, they force drivers to slow down and pay more attention to their surroundings while simultaneously reducing driver frustration.[1] There's also growing evidence showing improvements to pedestrian safety.[2] Stick a sidewalk on the other side of the trees, and besides being more pleasant to walk under, those same trees will do a great job of shielding pedestrians from any errant automobiles.
Beyond that, street trees can decrease noise and increase the aesthetic quality of a neighborhood. If you look at old historic housing areas in cities and towns across North America that were built before the rise of the automobile, you'll generally find lots of mature trees that contribute to the "charming " atmosphere (or whatever adjective people want to use to describe them).
At least seven or eight of my parents' neighbors have cut down their mature trees in recent years (most being least 25+ years old). I'll give them every benefit of the doubt and assume that there was a problem with the trees (disease or severe damage, etc.) even if I couldn't notice anything from afar, but I every time I go past those houses now, I so desperately want to ask: "ok fine, maybe it had to go but why the fuck aren't you replacing that tree?" Do people honestly think it looks better? Do they like mowing the grass under the hot sun without a tree in sight to give them even a modicum of shade? Those parts of the neighborhood now clearly look like something is missing.
0. https://www.epa.gov/heatislands/using-trees-and-vegetation-r...
1. https://depts.washington.edu/hhwb/Thm_SafeStreets.html
2. https://www.sciencedirect.com/science/article/abs/pii/S00014...