I work full-time, too. I have obligations that make it very unlikely for me to log in on some weekdays. This means other people will have completed the reputation grind long before I have.
So what?
Some people are done with both factions already, while I just got my Cavalry Drake. I love my Cavalry Drake, and I worked hard to get it. People with both factions maxed out have no advantage over me. I am not behind them in progression. If I, for whatever reason, become even more busy and am unable to devote time to the Sylphs, there is still so much else to do in the game. Whether I get my Goobbue tomorrow or in late March, my gaming experience overall has not changed.
Dailies are dailies. They are a bonus, not a requirement. People who hate dailies won't do dailies. People who like them will do them when they have time.