I've driven FWD cars with chains for decades. Good quality, correctly installed chains do not break. Incorrectly installed they will break and cause a lot of damage to the axle and CV joint.
Chains are often legally required in western states when it's snowing or icy. Occasionally, but not often, it's chains required for all vehicles (R3), even 4WD with snow tires--I've experienced that twice, once on Mount Hood, and once in Yosemite, and since I had chains for my 4WD vehicle I was okay, but many people were stranded, believing that they would never have to put on chains. R3 is very rare on major roads, they'll close the road rather than institute R3.
R1: Chains are required - snow tread tires allowed.
R2: Chains are required on all vehicles except four wheel drive vehicles with snow tires on all four wheels.
R3: Chains are required - all vehicles - no exceptions.
The California Highway Patrol will often institute chain controls even when such controls are not technically necessary, but they do it in order to slow people down in bad weather.