Can i opt out from writing this in my invite?

That’s exactly how I worded mine.

I think that's perfectly acceptable - your parents are paying for most of it, so their names should be in the host spot. Just make sure your fiance is ok with that decision as well. Some people choose to avoid the drama with their in laws and simply put "Together with their parents/families" at the beginning of their invitations, but it's completely up to you.

It's not a big deal do since His parents aren't contributing at all. You could add their names as a nice gesture/to honor them if you and/or your partner wanted and if your parents would be okay ... but you don't have to.
And if they ever throw a fit, they would be pictured as the "bad guys" since they are not paying for anything.
The same about your parents. You have to list them since they are contributing for more than 50%, they are officialy the "hosts" of your wedding.Otherwise it would be up to you and your partner to add them or not.

I think that's totally fine and also personal preference. We did together with their families because us, my parents and his parents all contributed (us and my parents more so) but his parents are just as important to me.

This is how invites are traditionally worded, has nothing to do with conflict with one set of parents

That is how they are traditionally worded. But it has nothing to do with who is paying but rather who is hosting.

We paid for 80% of daughter and SIL's wedding and "hosted," his dad paid about 15%, and the B&G made up the difference. His parents are divorced and their relationship is very contentious, especially on his mom's part. She did not contribute at all (the kids didn't ask her and she never volunteered). In the big picture, daughter and SIL wanted to tread carefully and not do anything that might create more tension or upset. For the invitations they went with something along the lines of: Mr & Mrs Jones (FOB/MOB) request the honor of your presence at the marriage of their daughter Allison Marie to John Smith, son of Mr Frank Smith and Ms Jane White.

Even though we were paying for the majority of the wedding, we fully supported the potentially inclusive message of all parents being included in the invitation.

We did ours "My parents, request the presence at the wedding of Me to H, son of his parents". My parents hosted and paid for the vast majority, but my IL's are definitely ones who would be super angry about not being included. It wasn't the battle I wanted to fight because invitations are thrown away and it's unlikely anyone will remember or care who was listed and who wasn't.

That said, there is nothing wrong with your invite plan - though I would recommend you look at WHY you want to do it that way. To prove a point that they're not helping plus kind of irritating you? Or because it's "etiquette" approved.

That is exactly how I would expect to see an invitation written out if the groom's family wasn't contributing at all financially.

If your future in-laws are not contributing financially then they do not go on the invitation.