CapnZapp
Legend
Because if there's no mechanical differences there's no point in psionics.There’s a bit of a difference between barbarian rage, driuid wildshape, and psionic powers.
Pionics very much *are* spells. The psion/ psionicist/psychic knows a certain number of powers chosen from a list that they cast a certain number of times per day.
They can be mechanically different with psi points and ability checks to activate and overchannelling and all kinds of other differences. Or they could be psionic magic that’s just different in origin, like divine and arcane. Making them different doesn’t make them more useful or fun... it just makes them different.
I tend to think the simplicity is just easier. Why reinvent the wheel when you can just give the telepath detect thoughts and the pyrokinetic fireball? Why redesign the psionic powers needlessly? That content is already in the game, and people know how it works.
Psions as spellcasters just makes them easier to balance, and easier to play. And there’s already spell point optional rules in the DMG for people who like that variant.
If you can't understand that psionics-as-just-refluffed-spells is deeply unsatisfying to many, you will not understand the challenges in creating a psionics supplement for 5e.