Partner wants to go back to oilfield

My partner started working in the oilfield in 2018 at the age of 18. He developed anger issues and little things would set him off. He worked 2 weeks on and 1 week off. During his week off, he preferred to spend time with friends and video games rather than his son and I. He also developed a porn addiction and I caught him talking to others behind my back and one who he confirmed he kissed. We split in 2020 due to communication issues and the complete lack of trust. He claimed the things he was doing was normal and “a guy thing” because the others were doing it too. He ended up being let go the end of that year and worked transportation with his CDL since then. We’re trying to work things out again, and he hates his current job and wants to go back to oilfield. I understand why he hates his current job and fully support him finding something else. But I’m not very supportive of him going back to the oilfield. I’m worried those issues will arise again since he’ll be gone more. I don’t want to see him become the angry person he was when he was working there. Not only that, but the disrespectful way his coworkers had talked about their significant others and he started thinking it was okay to call me those things as well. He’ll be missing so much more with our son. And I’m just worried it’s going to be an issue in our relationship again. Do I need to just suck it up or are my feelings valid with this?