Block walls are other structures
A perimeter wall knocked down by a microburst is covered under other structures, which is a percentage of the dwelling limit shared with every detached thing you own. Replacing a long run of block wall is not a small job, and on a lot with walls on three sides it uses a meaningful share of a limit nobody has ever checked.
Plants have their own small cap
Trees, shrubs and landscaping are typically covered only for specific perils and only up to a modest limit, frequently with a further cap per plant. Mature desert landscaping is expensive to replace and the policy was not written with that in mind.
Wind damage to a wall is not always obvious
A wall pushed out of plumb and left standing is still damaged, and the claim is easier when it is reported promptly rather than after it finally falls. Documenting the yard before storm season is worth the ten minutes.