What planet did you just arrive from? That hasn't been true since the late 50s!
Since then, with the exception of a few areas that had no "planning" until recently, planning was perverted to finding the most effective way to prevent the construction of affordable housing, and specifically to prohibit, by law, building or expanding facilities to keep pace with population growth!
Ever heard of the most moronic of all phrases, "growth-inducing"?
How many examples do you need?
Like the "firemen" of Fahrenheit 451, the planners of today spend their every creative moment finding ways to enforce by law the opposite of what planners did in the first half of the 20th century.
And nobody seems to notice!
We do need zoning laws - only not the stupid ones that exist in some communities.
I won't quibble if you want to change the word "some" to "most", although I think there are counties and towns that do well in some areas, but not many do well in all.
There are zoning laws I actually like - for example, ones that require that a developer include 10% "affordable" residences, some of which have to be public housing. Ones that require a certain amount of "green space". Ones that require a developer (and, yes, I know the home buyers pay) to pay for road improvements nearby. Ones that include commercial space in huge developments. Ones that might delay building until the school system can come up with a plan to accommodate new students.
There are more than a few zoning commissions (or boards) that have corrupt people on them, but that doesn't mean that we should do away with all zoning laws.