Mind of tempest
(he/him)advocate for 5e psionics
The point is that dwarfs have a definition in the fantasy zeitgeist, goliaths do not. Some definition is what I want something to work with.Probably playing the wrong game then.
None of the playable species in the PHB have much lore, because the expectation is that it will vary between settings. A dwarf is a blank slate to someone unfamiliar with Tolkien- increasing likely in the current diverse fantasy market. Come to D&D via BG3 and you will know more about githyanki than you do about dwarves.
Remember it is always some dms first time, thus it helps to make it so they do not have to fly by the seat of their underwear.