You can have lawful good goblins, you can have chaotic evil Firbolg. They're just extremely rare. There are a few rare examples however. ... As many have said the goblin would be much more likely to pretend to be good until it had a way to escape. Seeing as the mind flayers dont care where your from they could find themselves in the same boat as the other pc having to team up out of necessity goblins are playable in 5e and pathfinder 2e as a core race and if people only thing for not having them is they will be modded in doesnt that show that their are people who want then and are forced to take it apon themselves to make it on their own since a company wont with Baulders Gate 3 we have a chance to have ture freedom of character like we come to know and love in D&D