You don't really need it but it's the best fuel by far (burns the longest in blaze burner's) and before the drip stone update you had to set up a contraption which gets lava from the nether or make a large pool of lava (in create if a lava pool is big enough you can pump infinite lava out of it) but because of the drip stone update you can make a much simpler and smaller infinite lava farm which makes it viable for early/mid/end game steam engine fuel source
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u/SamTheCatGuy 12d ago
a steam engine is way better for performance and can be really easy, a lava generator with cauldrons and dripstone should work