(not the 7a as the glass isn’t very strong)
You just need to be carefull with them, you wouldn’t chuck around a £400 laptop the way some people chuck around thier phones and act all shocked when the screen cracks. No phone screen is particulary strong, regardless of claims made.
You can mitigate a fair bit though… a glass screen protector will add a bit of security and also a wallet style case provides a good amount of shock absorption. (I usually end up cracking at least one screen protector during the life of a given phone… it’s a sacrificial part) Don’t put it in your back pocket and sit on it, etc.