All rhyme is a regulation of sound. When rhyme is overused and mismatched to the meaning of the poem, it distracts from rather than reinforces the flow. Rhyme then becomes an independent activity; the effect is that of watching a child skip rope while trying to sing an unrelated song. If rhyme in a poem calls attention to itself, it should know what it is doing. It should be a strategy of the poem that its rhyme, or the form of which its rhyme is part, is meant to be noticeable.
Resumé
Razors pain you;
Rivers are damp;
Acids stain you;
And drugs cause cramp.
Guns aren’t lawful;
Nooses give;
Gas smells awful;
You might as well live.
– Dorothy Parker
Now take my alliteration.
May I for my own self song’s truth reckon,
Journey’s jargon, how I in harsh days
Hardship endured oft.
Bitter breast cares have I abided,
Known on my keel many a care’s hold,
And dire sea-surge, and there l oft spent
Narrow nightwatch nigh the ship’s head
While she tossed close to cliffs.
Rhyme is like sweets. Too much can cloy; more is not automatically better.