There's also a reason the 5e fighter doesn't have powers (and thus is an improvement over the "old" 4e fighter, which I guess in now analagous to a cassette player or a typewriter by your logic): because the 4e fighter was popular with some people, but anathema to more.
I can understand not liking something. I can understand not choosing the thing you con't like. I'm not so sure I get the need to actively suppress something you don't like. The 4e fighter wasn't broken. It didn't imbalance the game, grind it to a halt, or render it un-playable. Quite the contrary, it was part of a better-balanced, more smoothly running iteration of D&D than had previously been accomplished. Why then, is your preference so much more important than that of others? Surely, you can't believe your own appeal to popularity: Pathfinder only caught up with 4e (in what un-dependable numbers we have) /after/ a power-less fighter had been re-introduced for Essentials. Clearly fans of 4e, while not numerous enough deliver the kind of revenue numbers Hasbro wanted from WotC, are not some tiny minority - like fans of gnomes (whom WotC famously got stung for ignoringl).
Since I first read through the 1e PH, there is nothing about D&D I've found more jarring, more nonsensical, or less appropriate for inclusion in D&D than Psionics. My feeling about that are about as extreme as I'm going to be able to generate on the topic of a game - as close as I could come to honestly saying something is 'anathema' to D&D for me.
I'm not campaigning to have psionics pulled from 5e. I don't walk away from the table when someone plays an Ardent. What someone else is playing doesn't have to ruin my fun. As lame as the concept of a robot or ESPer in D&D may seem to me, they're just concepts. If the game still plays OK even with their inclusion, and can tune out or rationalize the stupidity of it. Ultimately, that sort of thing is subjective, and I can leave them to those who, inexplicably, enjoy them. OTOH, if psionics are whacked-crazy-broken, and a psionic in a game is going to be blowing through every encounter while the rest of us wonder why we show up, well then, they're not so easy to ignore or rationalize or even tolerate.
5e, more than any previous edition, is trying for a broad appeal, it's trying to be inclusive. To achieve that, it's going to have to 'include' a lot -
including some things you don't like and some things I don't like. As long as those things can, as it were, peacefully co-exist (ie, as long as the game's balanced), that shouldn't be intolerable.