How come people aren't complaining about disc brake rub? Because it's not a problem.

I'm always surprised to hear the complaints and claims that disc brakes are "high maintenance" on internet forums. If your disc brakes are high maintenance, if your disc brakes rub, the problem isn't with the brakes. It's with whoever is doing your maintenance. Careless, sloppy, lazy brake setup is almost always the problem. Here are the keys to brakes that work great, don't rub, and don't require maintenance until the pads wear out:

• When you set the brakes up the first time, make sure the brake systems are very well bled. This MAY require taking the caliper loose from its mount in order to establish a straighter path for the bubbles to travel between caliper and lever -- but it's worth it. Be obsessive about it. If you bleed the brakes well when you set them up, they WILL become a set-them-and-forget-them near zero maintenance item. There is no reason to have to bleed brakes again for YEARS and tens of thousands of miles if you do it right.
• When you set the brakes up the first time, CENTER THE CALIPERS!! Use the "business card trick." Shine a bright light in there to make sure there is daylight between brake pad and disc ON BOTH SIDES. If you do this, your disc brakes WILL become a set-them-and-forget-them near zero maintenance item.
• Don't contaminate your discs or pads or allow your discs to be bent. If you spill or allow oil (even skin oil), lube, grease, sealant, soap to contaminate your disc or pads, they will squeal. If you throw your wheels into a car trunk and allow the disc to get bent, it will rub. That's not a disc or pad problem. That's a care problem. Be nice to your disc brakes and they will be nice to you.

Be obsessive about initial setup and be nice to your brakes and they will serve you well and be extremely low maintenance. I have ridden hydraulic disc brakes for years on a mountain bike, a couple gravel bikes, and a road bike. The only times I've had brake rub and had to true discs after the initial setup is when I allowed the discs to be bent. I have never ever had to re-bleed a hydraulic disc brake system (granted, that's only with two or three years of use). (I feel better. I will stop my rant now.)