Maybe.
D&D was born out of a "See Orc, Kill Orc," mentality. You don't have to run it that way, but you don't have to not run it that way either.
Perhaps re-read that section? I think you will find that every Beholder is its own god, at least in its own mind. And a truly paranoid god at that.YES, it really does, and it is very annoying. One very creative section is the beholder one. I think because there is no "beholder god".
I like Volo's better. ToB is a catalogue of monsters, but meh. I can make monsters up on my own. Figuring out monster motives OTOH, Volo's does a good job of providing ideas.
one major downside to Volo's Guide as written is that it REALLY harps on the "The Gods Made Us/Made Us Do It!" trope for a large portion of the monsters. Depending on how positively/negatively you view that factor. you may enjoy the book more or less.
I think this is the key. More than previous editions, 5E's stat blocks are largely mathematical. Anyone can make stat blocks.
Yeah, it is only mathematical! Not at all similar to the other mathematical stat blocks you may have experienced previously.