that is what you do a lot of times. but then what if the user resizes the window? do you just scale the texture and let it look like crap? do you draw new textures on resize events? same question RE user changing font size. what if the game has lots of varied font sizes. now you have a lot of textures. what if the font has features that depend on adjacent letters? then you can't just render every letter and slap them on the screen as needed when people type.

fonts are hard