I don't really have any experience with area rugs; it is true that wool would last longer, but I am wondering if you should get a second opinion about the synthetic fibers. Maybe consult with the design staff at a larger store? Usually they do this for free, in the hope they make a sale.
Generally, if you don't have kids or pets, things do last longer than quoted. I've had my living room furniture (Scandinavian teak) for 30 years. The couches are just a teeny bit tired looking, but probably only noticeable to me. This furniture was not used as "family room" furniture, but, it has been used quite a bit. I think modern looking/sleek stuff holds up much better than "frilly" stuff, or at least it's easier to make it look new. I really dislike anything with ruffles, curtains, etc. I do like the occasional well placed antique that fits in well with the modern look I have.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport