Sandbags in Forge Mode, why so few?

Currently looking at the various amounts for different maps to see if any of them have more than others but so far all of them have seemingly way too few. Is there a reason behind this? If there is then I suppose there’s no need to draw attention to but if not there really should be more.

On the map Haven I started working on fortifying the upper center of the map to make a custom Flood match more interesting but I’ve run out of sandbags and there isn’t much else to build with. I’ll likely add barricades and other various things but sandbags really fit the theme I’m going for and there’s just not enough of them. They seem like small enough objects, so aside from their models just being a bit out of standard shape I can’t see a reason for there to be such a small limit on them.