Looks like you need to review what surveying is, it certainly is not just boundary. If engineering calcs are being done using your maps, and your not entirely sure what your doing, you could open yourself up to significant civil liability. But you'll probably be fine and confirmation bias will rule. GL
This is a truly hilarious statement "Bottom line is drone mapping as we call it is used for many purposes, and surveying isn't one of them". Just to refresh your memory of 'surveying defined'in California state law:
(a) Locates, relocates, establishes, reestablishes, or retraces the alignment or elevation
for any of the fixed works embraced within the practice of civil engineering, as described in
Section 6731.
(b) Determines the configuration or contour of the earth’s surface, or the position of
fixed objects above, on, or below the surface of the earth by applying the principles of
mathematics or photogrammetry.