No not really. It's just the most objectively available set of statistics to judge popularity. I get you're a big Neil Young fan but my argument stands. I'd also note that the BST show was a co-headline with Bob Dylan who, very clearly, was the draw that day.
That's potentially because Neil Young wasn't on Spotify for 2 whole years.
Additionally, Yusuf's songs are regularly included on major TV shows and movie soundtracks.
I'm starting to think you're actually Yusuf. Neil's bigger than you, just get over it.