Viewing pornography is not naturally hazardous to men or females. But I would use some caveats. There are people who most likely shouldn't see porn, like those with bad body image or those who have actually been sexually victimized. Depending upon your choice in watching, you can develop unrealistic expectations about sex or what individuals like or how you'll be expected to "carry out." And viewing with somebody requires real approval.
When none of these red flags are up, porn can certainly have advantages. Counselors often suggest it to help individuals become comfy with a particular dream they or their partner may have. Porn can reboot a couple's sex life. It can give you concepts, or help you connect with what turns you on.
Pornography can reboot a couple's sex life. It can offer you concepts, or help you contact what turns you on. Porn can provide you there at best, or disgust you at worst. It all depends upon what you choose to enjoy. With the availability of pornography online, it's possible to sample sufficient pornography quickly that you do not have to find yourself seeing wall-to-wall hard-core sex if it's plot driven erotica that attract you. You're just a victim of bad porn if you let yourself be.
And a word about sex or pornography addiction. I do not believe in it. Unlike a chemical substance, like opiates, you can't end up being "addicted" to sex or porn; you can end up being a compulsive viewer. In this case, it's not the pornography that's the problem; it's the compulsive personality. If it weren't porn being used to act out one's compulsive nature, it might be food or some other habits.
As for whether it's damaging or beneficial to the entertainers, let's take women initially. There are some who pick to carry out because they like sex a lot and they consider it an excellent method to make money. Then there are those who are drawn to porn as a way of acting out subconscious mental problems-- searching for daddy's love or punishment for being a bad lady. For numerous, it's probably a little of each. Even women with the very best psychological health will face some disadvantages from this work. Our culture takes in pornography at record numbers, but the ladies who porn videos perform are still evaluated roughly.
I'm uncertain the male entertainers get out entirely unscathed either. While they may not be evaluated as harshly as the women, eventually they're deemed freaks who make their living with their anatomy. John Holmes's fate is the ultimate cautionary tale.
Maybe if we weren't still so taken in with guilt and shame about sex, neither enjoying nor performing in these movies would bring the weight it does. But then, maybe we wouldn't be so thinking about them, either. If the fruit were not forbidden, would anybody care to take a bite?