Weight loss.

sireland67 said

Vacuum bag parts will increase strength, because it removes gasses, and compacts the part better.
Good CF parts are made in an autoclave, by vacuum bagging, then the chamber applies pressure to compact the fibers.

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An autoclave is not an option for DIY members here, I question the significance of the gases (or is it entrained air?) you mention that vacuum bag removes, and a compacted part is not inherently stronger by simply being thinner, actually the reverse might be true.
I have used 5000lb concrete blocks to compress had laid CF wing struts between steel plates in place of vacuum bagging, with satisfactory results, being vacuum bag maximum is only 14+lb psi.