Well, mdinaz-- I've been studying astrology for 25 years, and some here like Katydid have been working on it longer than that.... possibly we're the slow learners?
I think asteroids can have meaning in a chart, but they have to be used carefully and with restraint. Especially when their meanings are up for debate.
Juno by Demetra George, in James R. Lewis,
The Astrology Book. "In the hyman psyche Juno represents that aspect of each person's nature that feels the urge to unite with another person to build a future together in a committed relationship." This partnership requires a sustained commitment among two equals. An unhappy Juno in an unequal relationship experiences issues of "submission and domination, fidelity and infidelity, trust and deception, forgiveness and revenge." (George has more on this in her book
Asteroid Goddesses.)
J. Lee Lehman in
The Ultimate Asteroid Book refers to Juno as a significator of traditional marriage. Lehman found Juno to be highly relevant in a chart of a plane crash, suggesting that more broadly Juno may indicate a relationship (here, flight crew and passengers) where people "do not hold the key to power."
She also looks at other "love" asteroids like Amor, Psyche, and Sappho.
Trouble is, the more love asteroids we input, the more noise the chart seems to generate.
In ancient mythology Juno (Hera) was queen of the gods and she presided over traditional marriage. Unfortunately Jupiter (Zeus) was a big philanderer, and Juno was sometimes extremely jealous of her rivals, to the point of taking revenge on them.
I think it's worthwhile considering whether Juno in the 7th, for example, indicates someone strongly attracted to conventional marriage. Juno on the 4th might indicate someone longing for a conventional home life that comes with marriage. But it would sort of depend on what else is going on in the chart.
I use a very narrow orb for asteroids touching an angle; but if they conjunct a planet I would expand it a bit to allow for the planet's own orb.