Hi, Will!
My name is Kate, and I’m a mapper on the OSM team at Lyft. 
I agree with your point of view that there are no usual lane markings, but according to OSM wiki page - https://wiki.openstreetmap.org/wiki/Key:lanes it is not forbidden to add lanes tag in cases without lanes making, but the best practice will be added the tag ‘lane_markings=no ‘instead of removing the lanes tag.

While making changes I relied on the Lyft-owned images that were taken from Club View Drive in Dec,2023 (34°3′52″N, 118°25′22″W-https://drive.google.com/file/d/1t67VzDW7O4ppHS6S4cN78ic0t56aZ2ii/view?usp=sharing) with indirect new road markings ‘Ahead Stop’ and ‘Stop/Bumps’ in other place (34°3′54″N, 118°25′24″W - https://drive.google.com/file/d/1bKHHK7dUh7SrBq8GB2-lqxTHpgOuAg6b/view?usp=drive_link), also the road surface has recently been changed on this street and perhaps the road markings will be applied soon. Therefore, this all indicates that tag  ‘lanes=2’  for this road is logical information, and it would be better not to remove it.

Regards, Kate