To the Forge map creators making weapon spawns

I don’t forge. But I remember when Infinite gameplay was revealed, nobody liked the idea of weapon spawns on a wall rack.

How come so many of these maps have weapon spawns on a wall rack? I assumed this wouldn’t have happened once forge came out. Is it not possible to spawn weapons without them?

Its not a bothering situation for me. But I tend to use Forge eventually and I wanted to know how spawning weapons worked.