I have some mixed opinion on this. I believe first and foremost that your poem's "main element" (meter, rhyme, alliteration, extended metaphor and/or *MAJOR* (double) entendre') should be crafted, not accidental.
Most of the time, the "main element" is the statement - what it is the poem is observing, lamenting, analyzing, critizing, describing or exploring.
Whichever poetic devices or "tools" used, they should enhance the meaning and "music" of the poem. They rarely succeed or persuade when done for their own sake. It comes off as pedantic or -brrrrrr!!!! - forced.
Forced rhyme is about as beautiful as long, hard,dirty, jagged fingernails being dragged diagonally down the most "granular" surfaced/unsmooth chalkboard.
But when a piece lacks a certain "something" - frankly, sometimes the flair of rhyme done well is quite dazzling. That includes approximate rhyme, internal rhyme, and myriad rhyme schemes classic and invented.
If the poetry lacks rhyme because of the poet's lack of skill and verbal alacrity, it shows as drab and disappointing. When the poet is focused on something different, and manifests it with passion, originality and skill, rhyme is neither necessary, nor sometimes, even desired.