When my epilepsy was bad, a rail in the shower that I could grip when necessary would have been helpful. As I grow older having something to hold makes sense anyway. I would say look after your health and if you feel you would be safer with a rail than without, you should get one to suit your needs.

I have a bed rail. So no falling from my bed at night anymore

I have handles in shower its very helpful.

I used a chair in the shower. Stereotypes may come from Ignorance.

There are alert systems out there you can look up to see what would best fit your needs.