Pretty much all safety regulations

Every safety rule is written in blood but due to no one getting hurt (because of said rules) people begin to think the rules aren't necessary.

It's the same concept with preventative measures like vaccines. Vaccines worked to the point we had an entire generation grow up in a world without the most common forms of debilitating diseases and as a result we now have anti-vaxxers everywhere.

It's even prevalent in things like the hole in the ozone layer. When it was first discovered EVERYONE was panicking about it. But then we fixed it to the point some people think it was never really a problem at all.

Background music in any environment.

Life.

Wiping ones butt or using bidet after taking a crap.

Anything in IT.

Urban planning. Being able to walk or take transit to all your errands gets taken for granted until you move to a suburban asphalt desert.

Localization. It's not as easy as simply translating from one language to another!

Done right, you get something of foreign origin that feels like it was done in your backyard.

Done...less than stellar, you get "All your base are belong to us, someone set us up the bomb."

Pic related

UX/UI. To be specific input forms. Had to get past a captcha for an appointment. I have no idea how the site handled captchas but couldn't get past it. No indications if it had to be capitalized, with or without spaces etc... Just gave up after trying for a while.

A clean bathroom. Or not...

IT.

Network Administration.

If the network and servers all work: What are we paying you for?

If the network or one of the servers are down: What are we paying you for?

food you order at a restaurant.

CGI. When people say "there was too much CGI" they just mean "there was bad CGI" because the good stuff is imperceptible.

Sound quality.

I worked in life theater for almost a decade as a sound board op and audio engineer for a few local theaters.

People would always comment to the lighting board op how good the lights were.

But maybe one person in a whole run of a show would compliment the sound.

Boy oh boy, if a cable died mid show... The whole intermission and afterwards I'd have to hear "I do sound at my church and," or some variation of "I'm just a hobbyist but,".

You think I wouldn't pull that cable and replace it if I could???

The location of light switches relative to the light.

Door handle design that makes it intuitive whether it requires pushing or pulling to open.

Any maintenance

That powdery black finish on computer PSU's.

Anyhing IT

Having recently moved into a house with these issues: doorknobs. You never, ever think about the ones that just work well, but every iffy one is irritating every time you use it.

A goalkeeper in soccer or similar. It's a thankless job, you save 10 shots, nobody notices. But you miss one and you'll be called a bum by your own fans. As opposed to a forward striker, who might miss 10 shots, nobody notices. But you make one and you'll be a hero being paraded on shoulders.

Bass in music. If the bass play right, you don't hear it, but if they miss or play wrong there is immediately something missing

Proofreading.

Murder. Just sayin.

Sound effects or music on TV and movies. Cleaners. Machine maintenance.

Railway safety. On airplanes there will sometimes be people who clap when the plane lands safely. In modern cars we have a number of safety features that are pretty hard to ignore. But with trains everyone is (rightfully) focused on punctuality. Only in the rare event of a crash or similar so most people even begin to think about the safety aspect.

My work apparently. Other people got promoted for solving problems quickly. I didn't have problems. At least, I did, but I solved them without help or advertising them enough probably.

Garbage trucks / taking the garbage to the right place.

Seasoning