There is a learning curve to installing hardwood floors. It takes time, craftsmanship,. patience, and hard work. The results can last lifetimes, and nothing compares. But it's work, and the buy in (depending on the wood) can be pricey.
A lot of the box store bidders/installers know that they get a bigger profit margin installing vinyl or clad ("pergo") floors - They can get in and out, and walk away. So they'll give you every reason why "real hardwood floors" won't last, are a poor investoment, too much upkeep, etc. etc. etc...
Also, putting in hardwood floors - the old school type - takes a certain amount of craftsmanship and skill, and honestly, the guys who did floors for 40 years and teach apprentices to their standard are few and far between, and for the BB floor stores, they can hire a couple 19 year olds to slap down a lot cheaper and turn a bigger profit.
As to the "the climate won't take hardwood floors" - or "pineboard floors" or whatever other BS they're spewing - I know personally houses over 150 years old in some humid, hot, dry, moist, frezing, and/or crazy climates that, oh gee whiz. those floors are still there and still (once taken care of) look spectacular.
When we sold our houses - the BIGGEST draw was the polished hardwood floors. Wasn't like that 50 years ago, but now it's a serious upgrade, and you'll get your $$$ out of it if you decide to sell. The only time I'd go Pergo or the like is if it were a cheap rental where I had no expectation of the renters maintaining the floors. I had them in one apartment I rented, and I honestly hated the stuff - cold, lifeless, and looked fake.