It's not as simple as you're making it sound.
Making particle-metallurgy steel from scratch at home would be mind-numbingly expensive, time consuming and wasteful. It's not just a matter of getting the correct ratios of elements. Assuming that one could achieve the even distribution of elements and carbides, which is doubtful, and the whole point of the process, it would still be massively inefficient on a small scale. There's a reason the mills run it by the tons, and why it costs as much as it does - mainly waste and energy.
Some bladesmiths do make damascus by filling a mild steel container with bits of known steel and filling in all the gaps with powdered 1084 or 1095 (for instance). They then forge-weld the whole thing together, grind off the outside (the container) and proceed as usual with the resulting billet. But that's not a true "powder steel".
I do not entertain hypotheticals. The world as it is, is vexing enough.
Beckerhead # 350
Member, AKTI and KnifeRights