So everyone who has changed tires so frequently due to staggered setup is wrong? I live in a very dense area with lots of traffic and speed cameras everywhere. It's not like I'm racing people or carving mountains. This car is plenty fast and capable enough for me with a square setup.
		
		
	 
Sorry. Not saying that. Just saying that there are a large number of things to consider when it comes to tire choice.
The type driving you do. The environment you're driving in. Your expectation vs reality and so on.
Just going for a square fitment is no guarantee of meeting those expectations. It DOES allow you to rotate the wheels ( which is nice if you chew through rears faster than fronts etc ) which can extend tire replacement duration ( as has been mentioned to you ). Some people love a square fitment for handling....
My 2 cents, learn more about the tires you NEED.
If you only commute and fit Michelin Pilot Sport Cup 3 tires and expect them to last, you will be disappointed ( square rotation or not ) !
If you like to carve up the country roads and you fit LingLong brand, the tires will last for ever, but you'll end up in a ditch.
Also remember, all tires have a Best by life like most everything else. If you've had the same tires fitted for 10 years, they're probably hard as nails and more of a risk than a reward. If you buy a Stinger, you want decent rubber IMO. Now if you drive a Camry......
Example ( in my case ).
Fitment: With my after-market wheels, I chose to move from a 225/40/19 to a 245/40/19 front & 245/35/19 to a 275/35/19 rear because of ride comfort on our crappy Sydney streets and aesthetics. ( Use a tire size calculator to help determine what works without speedo 
mods. )
Tread style: I chose an asymmetric pattern ( instead of directional ) to keep noise down.
Will likely wear faster but I'm fine with that.
Brand: I chose a brand that provides a fitment that I like ( many factors in that alone ).
Tire style: I chose a variant that meets the tread wear and compound requirements I was looking for.
And so on......
Sorry for the long post, but just remember, tires are meant to be consumed when they're at their best.