Is there a benefit to not doing schools such as Ranger, Airborne, Air Assault?

These schools represent your willingness to be above the best. Ranger school is the best leadership school in the Army. Airborne, Air Assault are passages to our legacy and our mission. It gives all soldiers a level playing field. You don't have to be from a combat MOS to go to them and it as someone had already stated - having sat on a promotion board, it separates two otherwise equal packets.

If you are asking, then don't go.

I really cannot speak but, my Grandson (Junior at Texas A&M, in Corps of Cadets, already enlisted, and has goal of becoming a Ranger. Has jump school this summer. All I can say is I am very proud of him and his goals and successes!!!

Definitely wear and tear on the body that's for sure but I joined the army because I wanted to jump out of their planes and go to combat that was the sole reason why I joined

you don't get all the fancy trinkets on your uniform.

you get to lay in the hospital a couple of decades down the road while the doctor shakes his head sadly and says, "... what a pity, there he is dying of nothing."

If you're asking this you may wish to consider ETS. Success in the Army is in part related to how much flair you have on the uniform. So if you want to stay in, go for them. If not, then ETS.

These schools are like any civilian school...they give you more knowledge and insight to be able to complete a mission more efficiently. As a member of the 173rd Airborne first tour and 82nd 2nd tour in Vietnam, I felt very comfortable being in the company of those who had undergone similar training.

Not having a broken down beat up body after you get old.

The only benefit of not doing them is the risk of injury.

Honestly, I believe that certain schools should only be given to those that will actually need them and use the training. I once saw an Intel Captain, not prior enlisted, with Pathfinder wings. It made no sense. But it's the pretty badge people want.
Giving school slots to those that don't need the school takes away from those that do. Especially with the Army always worried about money and training. In the 187th Infantry back around 2011, the BCT CDR stated that only enlisted will be given Pathfinder slots, it was awesome. More often than not, the SSGs and SFCs in the scout and infantry platoons are the ones conducting PFDR ops, such as HLZs and slingloads, not the Officers.
Ranger is another school, it is damn good for the ground pounders, but not so much the support - unless they are going to switch to those MOS', same with Airborne, how many "5 jump chumps" are there that will never even conduct a proficiency jump? Thousands.
The schools are used by many as a way to get promoted, but there are better ways, and people should worry about school that enhance one's MOS. A finance Soldier doesn't need Airborne in that field, but a degree, and other ASIs could greatly increase their skills within the jobset.

I would love to go to Freefall school, but it is not really in a Civil Affairs skillset to freefall into a country. So instead I've been to evasive driving, instructor, and others that actually are useful during a deployment.