As with everything 3d printing, it’s a tradeoff.
It’s harder to prevent oozing, harder to change colors, worse quality(usually) and larger nozzles.
But you print much cheaper, often can print larger parts with larger nozzles (stronger).
What I do with printing, I’d seriously consider a retrofit pellet extruder on my smallish machine (e5+) If it were reasonably priced.
Almost everything I do is “structural” and doesn’t need to be pretty direct off the printer.
It sinks.
Tungsten isn’t reactive with water, it’s not an alkali metal.
Sodium, lithium, potassium etc (alkali metals) would react violently with water though.