sometimes you may have thin space between rows or points or polys you want to select, I usually use the volume mode since we do not have a box selection mode STILL in Lightwave 2019, now
if I wanted to chamfer a couple of points selected this way, it would not work in chamfer mode, you have to select the points..which frankly is odd since volume mode should consider the points selected, probably it does but the chamfer tool doesn´t recognize this.

Better yet is to implement a true box/rectangular marquee selection tool, that will at least get it to work with the chamfer tool without rewriting it.

The lasso tool is out of question.