Yeah, 'telepathy' alone, is crazy here. Technically, it is the power to send and receive thoughts, and there's literally no reason why it has to go beyond vocal range (let alone around the entire planet! Heck, Spock, one of the more famous non-X-Man telepaths, has *touch range*).
But many Marvel telepaths can also alter or delete memories, project sensory illusions / hallucinations (Mirage's entire power), directly control people's minds (Karma's entire power), translate languages (Cypher's entire power), instantly teach languages and skills to someone else, instantly learn various languages and skills from other people (Prodigy's entire power), astral project (Trance and Scanner's entire power), usurp control of your nerves to move your body around (Cerebra's entire power), create mental blasts, create mental shields, project mental shields over another, implant phobias, implant post-hypnotic suggestions, make themselves undetectable / imperceptible / everyone ignore them, sense and manipulate emotions (Empath's entire power), etc., etc.
I'd accept that *some* telepath, like Xavier, has managed to learn all these amazing stunts and off-shoots of the core ability to send and receive thoughts, but it seemed like anything he did, any telepath was soon able to do, and Emma is body-swapping with Iceman (even tho she had to use a machine to do it with Storm, previously), and Betsy is telepathically teaching people to speak Shiar, etc. (even if those specific stunts shouldn't necessarily be easy for anyone with the power, any more than I can shatter a wine glass with my voice or win a Grammy, just because I can talk, or I can compete in the Olympics because I am able-bodied).
And then it gets sillier when, as you point out, some writer conflates telepath with 'psychic' and starts tossing around telekinetic stunts or precognitive dreams, as if they were part of 'telepathy.' (I vaguely recall Betsy herself being considered precognitive, for a hot second, years ago. Shes's one psychic power (pyrokinesis) aways from being Legion...)