Technically, if you had a Starpath Supercharger for your Atari 2600, they were indeed game tapes. The very first console RPG, Dragonstomper was on cassette tape. A version of Frogger was on cassette tape. There were various others as well, including a Breakout style game called "Fireball".
EGM should do some research and see that there is such thing as a game tape. They are just very old or were made for computer systems like the TRS-80 which had a tape drive as well.
But if the people are referring to cartridge games as tapes, that's where a line should be drawn.