Might help to understand the trichome's likely purpose. The article below is the best source I've found on the broader purpose of trichomes in trees, but translates well enough to cannabis:
(I highlighted my favorite parts)

"The underlying purpose for trichomes on tree tissues is as diverse as the trichomes and the trees species involved. Roles for trichomes revolve around light absorption and reflection, tissue protection, water conservation, and microbial interactions.
Young leaves of many species use trichomes to shade photosynthetic cells until they are fully operational. As leaves expand, the effective density of these trichomes declines. Trichomes selectively block ultra-violet wavelengths like a translucent or transparent coating. Trichomes also shade tissues from other wavelengths and reflect heat energy away from leaf and bud surfaces. Trichomes help elevate the primary energy exchange interface of the leaf.
Trichomes tangle, disrupt, confuse, and prevent some types of insect injury and use. Densely wooly trichomes prevent insects from contacting the leaf service. Trichomes with defensive materials at their ends touch and stab at insect visitors. The tangle and mass of trichomes interferes with chewing caused injuries. Trichomes also provide an elevated platform upon which dust and fungal spores can be swept away by wind and water before they would touch the leaf surface.

Trichomes can help minimize water loss. Tufts of trichomes are positioned around stomates, the water control valves in a leaf, and slow water evaporation. Trichomes also form a thicker boundary layer of higher relative humidity around a leaf which slows water loss. Shading and reflectance by trichomes also lowers tissue temperatures which lessen food use and decreases water evaporation from tree surfaces.
...

Problems:
Trichomes slow wind movement and shields surfaces from rain erosion. Some trichomes help protect tissues by softening abrasion and bruising contacts. Unfortunately, the trichomes that protect in one way facilitate damage in other ways. Trichomes form centers of surface wetting that can accelerate leaching and cuticle damage. Acid rain damage can be isolated around trichomes. In addition, some pathogens depend upon spore germination above leaf surfaces.
Trichomes come in many shapes. Some trichomes are long and thin, matting down in a thick felt-like surface. Other trichomes have multiple branches that looks like a tree in miniature. Still other trichomes have a circular crown of branches which are star-shaped. Some trichomes are colored with a pigment or develop a color from weathering and from the environment, but most trichomes have no color. Trichomes do not have chlorophyll.

Tree Trichomes: Big Hairy Tree?


If there was to be any type of benefit, I believe it is immeasurable and subjective to the common cannabis gardener. The only instance I can think of that may validate this notion, is if the trichome purpose in cannabis is to protect from UV. Then the plant, which is expecting sunlight soon, produces more delta-9 or CBN's/CBD's in anticipation of a morning that never comes.
But then again...this could be an argument mor geared twords 48-72 hours of solid daylight before harvest, too.
Would be a great lab experiment if you had the right equipment, tho.