Heat is the main culprit. Rubber bushings are engineered for a temperature range, and Houston summers push surface temps on asphalt past 150 degrees regularly.
The bushing material oxidizes, hardens, and cracks. Once it cracks, every bump hammers the steel sleeve directly against the control arm bracket. Coastal humidity adds rust to the equation, suspension fasteners on vehicles driven near the Gulf corrode and seize, which turns a straightforward control arm swap into a longer job when the hardware won't break loose cleanly.
The heavy stop-and-go traffic on I-10, I-45, and the Westheimer corridor compounds it. Suspension components don't just wear from miles; they wear from cycles. Every pothole, every hard brake, every curb drop is a cycle. Houston delivers more of them per mile than most Texas cities. Joel accounts for all of this in his diagnosis. He's not running a quick visual check and calling it done.