What is the average lifespan of an iPhone SIM card slot? How many times is it designed to be opened and put back in?

A few days ago I wanted to check my SIM card in my iPhone 7, so I opened my SIM card slot. After checking I put it back in, but then I felt uncertain thus I have a habit of checking things repeatedly, so I opened and put it back in again. But my uncertain feeling just wouldn’t go away that easily, and so within the day I repeated this process 4 times in total.

I understand that such severe uncertainty is just my problem, my phone works fine now but I’m a bit worried that I could damage the SIM card slot pretty easily in the future after what I’ve done a few days ago. May someone be kind enough to answer my questions? Thank you very much.