Do I even need a strong phone case for my job?

I got a new phone, and I have one of those rubberish/plastic clear ones. I don't think it provides a lot of protection. I gave a cleaning job. I guess the most strenuous thing I do Is bend over to empty trashes. If I worked construction or something then I would get like an otterbox or something, but does it sound like I really need one in this situation?

Do I even need a strong phone case for my job?
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