It is the opposite, you need unlimited time play he said/she said yoyo driven development if you don't document things. The compression ration might be 1000 words said to 20 words written, so it is no big deal. A 2% tax that is well worth it (assuming speaking and typing speeds are similar).

YMMV if the team is very small, very smart and everyone has a great memory or the problem domain is tidy.