I used Jitai, a font randomizer script on WK for a while, and despite not practicing handwriting, i had no problems recognizing the Kanji, even with that weird banana font.
Of course handwriting practice does help with reading, especially handwriting.
If you enjoy learning handwriting, that’s great, but i think it’s not important until you’re somewhat fluent, that is, you actually know something reasonable to write in any given situation.
In the beginning, reading Kanji, vocabulary size and grammar are much more important.
See that thread of a lvl 60 user having an easier time learning to write after completing WK.
Though again, if you enjoy learning to handwrite and you have the time in your japanese study routine, by all means, enjoy (=