Maybe Lennon just liked the music with Yoko, possibly had opinions about it (arguably sophisticated ones, being a brilliant, immensely successful professional musician and songwriter), and didn't care if it was popular. We can't read Lennon's mind; any comments on someone else's thinking are BS without direct evidence from the person themself.
Many people see little relationship between the popularity of music and its 'quality', whatever that means, including me. The more sophisticated my understanding becomes in anything, the more I diverge from the public norm: in any domain, the public is unsophisticated because most people are unsophisticated - i.e., that includes me; you can't be sophisticated in more than a few things. We might expect Lennon had much different taste than others. I'd sure love to learn to see it from Lennon's perspective.
Many people see little relationship between the popularity of music and its 'quality', whatever that means, including me. The more sophisticated my understanding becomes in anything, the more I diverge from the public norm: in any domain, the public is unsophisticated because most people are unsophisticated - i.e., that includes me; you can't be sophisticated in more than a few things. We might expect Lennon had much different taste than others. I'd sure love to learn to see it from Lennon's perspective.