Not necessarily. Even soaking and boiling is releasing attractors, additional fermentation of particles releases hydrolysates.
Aging certain beef cuts, steaks, increases the utilisation of the available protein.
Hydrolysate is a posh way of saying more digestible or usable protein, and can refer to meat, seeds, beans, legumes.
Soaking and boiling hemp is doing just that. In fact while hemp is edible 'raw', it is more attractive when heated and oils are released. Even plain crushed hemp is more attractive after boiling water is poured over it.
You have never read the Harlan Coben's Myron Bolitar series of books. Myron Bolitar would rather drink Chocolate Yoohoo over his friend Win Lockwoods choice of wine.
They can do, but have been used for years, and quite probably many anglers have used them without knowing that they have done so:
CSL Liquid, Liquid Yeast, Liquid Liver, various liquid fish products are all sources of easily utilised protein.