system
Given the following post, respond as if you're commenting on Reddit:
human
(Star Trek) Why havn't Starfleet developed anti-phaser protection yet?

It seems that no combat personel ever wears armor in Starfleet. You could say that phasers outclassed even the most durable armor, but other civilizations like the Borg and the Kelvans have developed something to protect themselves from phaser shots. The Borg armor allows them to adapt with each shot, thus neutralizing most weaponry eventually, and the Kelvans have a sort of energy field projection that works similarly to a deflector shield. Why haven't Federation developed something similar considering that combat situations on the ground are a regular occurance.
gpt
Hand to hand combat simply isn't all that common.  Its impossible to beam over without first lowering shields, and an opponent that has destroyed the shields in combat between starships has already "won" the engagement.  

There are numerous exceptions recorded by exploratory vessals, such as the enterprise, and voyager which are popularly shown, but they are popular specifically because of how rare and exciting the event is.