Yep. Transporters are the worst. Store a pattern when you’re healthy, well nourished, and hydrated. Beam down when you need to and have that person make the report. Beam them to nowhere after the mission. Have a neural implant that stores the memories and upload them so there’s no gaps. Need an army? Beam a thousand copies of your security team down with weapons and energy packs to spare.
Transporters, as described in various sources, don't work like that. The pattern isn't stored as "pure data". The "pattern buffer" stores your "matter stream" - the energy that was your body, with the information about you encoded in that stream. In effect, the material to make you, and the information to make you, are not separated. This is necessary, because the complete data needed to fully store a human is very, very large, even by Federation standards.
The transporter does keep a record so that upon transport it can filter out some things. But that's not a complete record of all the data needed to make you. In today's terms, it is more like a "checksum" they can use to remove that which doesn't match "you". But there's only so far this goes - your brain state is part of your pattern, but the transporter does not remove your memories when you come back, for instance.
And, as Dr. M'Benga has told us, you do have to rematerialize the person every once in a while - the pattern in the buffer will degrade otherwise. It took Scotty to figure out how to store patterns on very long timescales, and it is not recorded if he passed that trick back to Starfleet.
While there have been cases of duplicating people (hi, Thomas Ryker!) those have been accidents in which the transporter beam interacts with extremely large and powerful energy fields, beyond what can be harnessed on a starship, even by races like the Borg, who have some really big starships.