There are industrial rust removing lasers. They are however, very very expensive. Even a small handheld, relatively low powered one, can cost as much as a sports car. They’re also relatively new technology. Sure lasers in some form or another have existed for many years but purpose built high powered lasers are still relatively new. That means that for a business to justify the cost of owning and operating such a laser (don’t forget the power bill!) it has to be of a certain scale.
Chemical rust removers on the other hand have been around for a long time, they’re fairly cheap, and also fairly effective, and also more versatile. They’re ideal for household use as well as professional, small scale use. Not every plumber or mechanic has the money, or even need for a $200k laser when a chemical rust remover does the job just as well.
Lasers are more suitable for more specialised tasks and make sense in a different environment.
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