You guys react as if pompous and self-indulgent are bad things. They're a huge part of R 'n'R. They're bad words only in bad hands. And with bad brains.
Seargant Pepper is both, so's most of Floyd, Rush, Phish... That's what you work toward---being able to tell everyone that was once over your head to f'off, so you can do exactly what you want, how you want to do it.
Some musicians are lucky enough to do it right outta the gate and find an audience that digs their own unique thing. Others have to claw their way there.
Have you ever witnessed a Paul McCarty symphonic piece? Now there was a couple of hours of Aural Ambien pomp and indulgence.
Still, selling ketchup popsicles to ladies in white gloves.