At the library where I work, I've had to help so many elderly people who can't make head nor tail of web forms. I'm happy to help them, but the issue shouldn't exist in the first place.
Whether it's applying for a parking permit, recovering an email password, booking a holiday, or whatever else, bad forms are a usage barrier.
If your web form can't be understood by a pensioner with limited computer skills, it's not good enough.