You must be new to everything if you haven't heard conspiracy theories regarding the 2 things you're questioning.

JFK: lone gunman, CIA/Mob, magic bullet

Secret gov tech: come on really? area 51, MK Ultra

If you really are that new, then boy, do I wish I was in your spot. You're going to have a lot of fun with some new reading. Whether because you believe them, or because of the enterainment in seeing others believe them. Either way, it's a whole new world...

Except MK Ultra turned out to be a thing

you say that like area 51 is not a thing. it very much is a thing. however, the things people say about those things are not necessarily accurate.

First, being pedantic, you mean the conspiracy theories surrounding them. Certainly there are some crazy theories. At the same time, given the suspicious circumstances of JFK's killing, there's a decent chance a conspiracy to kill him between some people did occur. With secret government technology... I don't know if that counts as conspiring. We know they develop things in secret. Of course, you can have crazy theories about what they're developing. It's also, in either case, crazy to believe a theory is true without any evidence.

Loony, completely unsubstantiated fringe deviations aside, governments really do develop and build secret technology in secrecy, in ways that can only be guessed at by very hazy inference for a time. And there are enough weird things about the JFK assassination for it to be understandable that many people, even serious investigators, spent decades with doubts about the basic lone gunman narrative.

>governments really do develop and build secret technology in secrecy,

Well, if they developed them in public, they wouldn't be secret.