Alcohol extraction allows you to more precisely control dosage as lower potency weed will produce the same potency oil…just less of it. This is extremely helpful when trying to produce consistent results batch to batch.
The MBM is a good tool but does oil infusion with a fair amount of chlorophyll. A decent QWET in 190 proof alcohol will extract all the goodies but leave the chlorophyll behind.
You can do this with nothing more than a few Mason jars and filters if you have a supply of grain spirits. I bought a Source Turbo to recover my alcohol and reuse.
You can’t do this with an MBM:
That’s 5 grams of primo dab material.