Well pong and space invaders had nothing to do with reading except for the score - tetris was an excellent game but didn't rely on either it depends on the game genre - Ocarina of Time was rated as one of the best games of all time and had subtitles, all I can remember from voice acting of that was Navi's annoying "Listen" - still the gameplay was good for it's time
Sid Meier's Pirates has just odd grunting and made up sounds for voice acting yet the gameplay is pretty good, I don't recall much meaningful voice acting from the CIV series - but I do remember spending hours reading the Civopedia and I sunk more hours into those games than any other
There is a wide variety of games that have been hugely popular eg Sims (over 100 million sold) that don't have voice acting and are quite acceptable.
Try saying those games are not relevant to the shareholders of those companies and they will laugh all the way to the bank.
Voice acting is great when it works - however sometimes I wonder if I am supposed to be directing someones movie instead of playing a game - if game developers continue to focus on making the game an engaging and most importantly replayable experience I don't really care if it is voice acted or text based as long as I get my money's worth of game experience. I'm certainly not going to limit myself to only voice acted games.