" I'm looking at mine, and the vast majority of it is zoned for SFH".
And? SFH lots will take a lot of area by construction: each houses a single family so you need a lot of those. It would be insane to have more commercial lots than SFH, who is going to provide business for that many shops? I see apartments and townhomes everywhere too. My city is Austin, which apparently is suffering from the "housing crisis" more than most cities.