Absolutely not.

For me, I cannot imagine a worse single-bike. Maybe as a fifth bike.

For me (and I am not, you, your preferences are going to be different from mine): One bike: Endurance Road. Two bikes: Endurance Road, and Hybrid with rack and fenders. Three bikes: Add a mountain bike. Four bikes: Add a weight-weeny road bike. Five bikes: Ok, now we're at a point where I might justify a fatbike. But this is pretty theoretical; I'm pretty sure that, while I may be able to make the case for a third bike (a mountain bike), I'm never going to get #4 and #5 past my wife.

But your riding needs are totally different from mine. If a fatbike is a good decision for you, don't let me stop you.