Bhagavad Gita, Chapter 12, Verse 5
Greater is their trouble whose minds are set on the Unmanifested; for the goal of the Unmanifested is very hard for the embodied to reach.
Krishna is honest here about real difficulty rather than pretending both paths are equally easy.
Naming the formless path as genuinely harder for embodied beings isn't a criticism, it's a practical warning. Real honesty about difficulty is offered instead of false encouragement.