This argument is not accurate.
Have you cleared all Coil 1-5 with all jobs at Min Item Level, have you soloed all bosses possible on RDM, have you earned 1million MGP...... Have you counted all the pebbles on the ground both in the Fringes and Northern Thanalan. These are Technically things you can do in game. But they are meaningless in terms of progression at all.
Sure there is content in FFXIV a ridiculous amount but most of it is pure fluff or completely negated with newer patches. What people argue about is meaningful content that progresses your character, which in that this game is sorely lacking.