Do you believe it is wrong for an employer to fire a person for having tattoos?

Maybe teenagers and young adults should consider how that tattoo might impact their future before they get it.

Because of public stigma, employers are not going to change their hiring practices. Employers don't want to drive away customers based on possible issues they may have with tattoos. (either because of the tattoo or because of what the tattoo is.)

Change takes time. In another 30 to 50 years, it might not matter at all. And maybe business meetings will be conducted in shorts and t-shirts because image isn't important.

Now, an employer should not fire someone because of a tattoo provided the person had the tattoo before being hired. Employers should make their policies clear. For example, no visible tattoos allowed. If an employer has that policy and then an employee gets a tattoo in a location that is impossible to hide, then the employer does have the right to fire the employee for clearly violating a company policy.

Appearance is everything, especially when you work for a business. If they don't want that in their company, then they don't have to hire you, if they think a person who has tattoos is going to scare off customers, then they don't have to hire you.

Most places will still hire someone who has tattoos but you have to keep them covered, that is just how it is if you work around the general public or in a business environment trying to impress potential clients.

Well, unless they said "I didn't hire you because of your tattoos", how do you KNOW, without a doubt, it wasn't because of something else?

Anyway, employers allow employees to have tattoos, as long as they are covered up. (Getting a swastika tattooed in red and black on your forehead isn't the way to go.) Plus, it's not like they don't tell prospective applicants about it first. What next? "As long as I don't use drugs during work, I'm just expressing my individuality"?

It's not professional.
It's like coming to a court of law in a T-shirt and shorts.

It's tricky. I have four tattoos and they are covered by a short-sleeve tshirt. Depending on the company, then it's people are representatives of the company. The founder(s) and CoB may not want people with them working for the company. They have every right to do so.
The qualities that cannot be discriminated against are laid out by law. Tattoos are a choice. More businesses are being open to tattoos, but not all have to be. There are many careers which are female only and no one is complaining.
As for trans, I'm not going there.

I hate to say this but you gotta accept it. I have two tattoos. Both on my wrist and one of them is long so its easy for people to see it especially if I'm wearing a t-shirt so no hiding that but if an employer saw it and wanted to get rid of me/or didn't hire me because I have tattoos, then its something I have to accept. Tattoos is not considered professional, same as having long hair (for men that is), even Triple H from WWE had to cut his hair short and his higher up, so its not specifically for employees, its also for people in management position.

some jobs have a "meeting the requirement " for the job means no visible tattoos

I have worked for a few places that had this rule and it was enforced

just because a tattooed person made their choice does not mean business needs to bend to them

Yes, as this is superficial.

Yes, especially if the name of the employer's daughter is on their forehead.