Nothing about the sonnet is perfect for the love poem, either. Genre simply provides a way for the reader to look for things that have been done. A form is a useful thing to use. It has history and resonance. It informs you as to the way things have been done in the past.
“He’d caught a fatal glimpse of that level where everybody knew everybody else, where however political fortunes below might bloom and die, the same people, the Real Ones, remained year in and year out, keeping what was desirable flowing their way.”
Thomas Pynchon | Vineland