A lot of the lyrics to tool songs focus on transcendental, spiritual, or psychedelic experiences. They also feature complicated compositions and a high degree of technical skill. As a consequence, some folks that have a “I’m on a higher plane of existence compared to you sheeple” attitude are attracted to the band. Which I think is what the meme is poking fun of.
There is some truth to it I suppose. When pusicfer (whose lead is the singer from tool) released Apocalyptical during the pandemic (a song that was clearly criticizing the stupidity of covid deniers/misinformation consumers) a lot of tool fans got upset because the song was not consistent with their conspiratorial world-view
I’m sure there’s many other layers to this onion f we wanted to follow the rabbit hole…
Eidola’s exceptional album degeneterra comes to mind. From memory they claimed the albums concept was like a tesseract that can be viewed from multiple angles through each song.
There’s probably room for some bad religion in there, too?
Katatonia probably deserves a mention as well, but it’s all so vague and personal it’s hard to really tie down.
I haven’t studied any of them, however…
These are the only tools i listen to

stavvy is a piece if shit with a kernel of gold.
dude is living the dream and nobody can take that away from him.
But… the one time I listened to Tool I listened to Ænima (on cassette) while taking mushrooms and they kicked in right at the end of (-) Ions and when Third Eye started I was off my face and didn’t know what was happening.
That makes me different… right? 🤒