It would be a very simple version of a CWE (cold water extraction), 'cwe' with 'lsa' or 'hbwr' or 'mgs' or unabbreviated should yield plenty of google results.
Yeah it works, but it works better if you acidify the water a little with some citric acid. It will be less effective than using very good organic polar solvents and will also not really do a very good job of getting it clean I guess.
Methods to get it cleaner involve washing the seeds with a non-polar solvent first, and also to use an alcoholic or acetone extraction step first before using your acidic water.
- Non-polar solvents dissolve possible nasties, making it cleaner before you proceed - you just wait until all of those solvents are evaporated away again after washing.
- Alcohols or acetone do a good job of dissolving a lot of the LSA well, but not the solids etc. This time you collect and save what is left when the strained solution evaporates.
- Doing the acidic water extraction on the crude extract after that shouldn't be so lossy because you don't have to pull it out of the plant matter.
IMO that's what each of such steps serve, so omitting them will make you miss out on the advantages from them.
Depending on how good a job you do of grinding and crushing, this simple version of yours may be meh or fine. Actually apart from the gunk that can be washed off the outside, a water extraction while leaving LSA behind, also leaves nasties behind.
The seeds can be pretty hard so it needs really serious grinding to truly pulverize, the finer you make it the more surface area you have and the better the extraction is. Softening them up with water might work (do you know?), but I am not 100% if you even want that. It depends on what method you have of grinding / crushing / pulverizing and if you have equipment how effective it is and what it can handle... maybe you want the seeds to be hard and brittle so that they actually break up, rather than just having sloshy fuzzy shit hanging in there. Again, not sure.