Why would you want to do overhead squats unless you’re an olympic lifter. Not all people can perform these various lifts with safety. If you cannot fix the flexibility issues and do this, you might want to look into different exercises.
This is exactly the reason to continue to perform this movement. OH squatting is a great indicator of overall functionality IMO. Giving up on an exercise because it is technically difficult or requires some persistance is definately taking the easy way out. Sounds like sour grapes to me.
As far as safety goes, at the very least the lift can be performed with DB’s and eventually progress to a bar. There should be almost no reason that a normally healthy lifter shouldn’t be able to perform OH squats or (overhead lifts in general) safely.
It’s also a way to damage your shoulder if you have any underlying problems.
Not everyone is built for every exercise. The insistence on having to perform something that you’re not ready for or built poorly for is a recipe for disaster.
People with shoulder issues can mess theirselves up with OH squats. For many it is little reward for great risk.
There seems to be some cult about overhead squats, a movement I have never seen performed outside of an olympic weightlifting gym. In my opinion they’re unnecessary for many. You cvan get the same results from other exercises that are easiser on your shoulders.