Beyonce was not Destiny's Child. This was evidenced by the fact that Beyonce wasn't able to do well on her own. Beyonce did not become a star as a solo artist until the moment that the opening notes on "Crazy In Love" dropped. It's revisionist history to suggest that Beyonce was always this huge star or that she carried Destiny's Child. She was actually getting booed after the shake ups within the group. Kelly Rowland's solo album was made a priority over Beyonce. Her own label was on the fence about her solo album when "Work It Out" didn't do well.
The Destiny's child albums preceding and following Beyonce's debut, sales of Beyonces debut and Kellys were as following
2001 - DC - Survivor
4x platinum (4.6 according to Billboard, no ww # found)
2002 - Kelly Rowland - Simply Deep
Gold (602k according to Reuters US, 2.5 million ww according to a broken link)
2003 - Beyonce -Dangerously in Love
4x platinum (5 million US according to Billboard, 11 million ww according to MTV and Columbia Records)
2004 - DC - Destiny Fulfilled
3x platinum (no ww # )
It's a striking pattern, might be random.
According to Nielsen Soundscan through Huffington Post
Beyonce has sold 17.7 million records in the US and approximately 60 million worldwide.
Destiny's Child has sold 18.6 million albums in the US & 40 million albums worldwide.
According to Nielsen SoundScan, A Breakdown of Beyonce's US & Worldwide Album Sales | HuffPost
What's good with facts during these Trump days