65917.7.b.4.A and B both impose minimums on the maximum height limit that can be imposed. They do not impose a minimum on the height itself. This bill allows for building higher, it does not force it.
A loud minority of people already fight transit and successfully prevent it or water it down. The type of people who fight transit also fight housing. There isn’t really much headway for their coalitions to grow because they’re selfish old boomers who want to pull up the ladder, it’s not an message that inspires solidarity.
It's the same mentality that uses the "within X' of a school" that elides over the fact that a sufficiently large X will cover everything in the jurisdiction. The PLSS grid system put a school at every other corner, so there was a school every 2 miles, and no child would have to walk more than 1.414 miles to reach one. So if you had defined a zone "within 7500' of a school" that would have been a synonym for "everywhere" that bakes in "think of the children" to your legislation.
"Within X' of a public transit station" instead bakes in "think of the hordes of poor people".
Basically, the city outlaws any building taller than 40' above grade at its highest point. Between that, and minimum setbacks from the frontage line and other property lines, 90% of the work to prevent densification is already done. Once a building plan has grown to completely fill its legal envelope, there's nowhere else to go but down, and that becomes prohibitively expensive fast.
The remaining 10% can be handled by mandating a minimum square footage per residential unit that is slightly more than half the theoretical maximum from a building at maximum height and minimum height on the mean lot size for that zone. Then no amount of building up or out can allow you to squeeze another unit onto your property. You have to resort to tricks like lowering ceiling heights.
If you enact a law at the state level that triggers automatic lessening of restrictions on building heights or setbacks every time a municipality fails to grow enough housing, zoning boards will be a lot more tractable when a developer wants to build.