[Grammar] Why do we use passive tense on cells when talking about "scatter" ?

[Supermonkey]

:roll:

I saw a newspaper having a sentence below:

My cells were scattered all over the place. I had no choice. Mastectomy was presented as my only option.

Why do native speakers use passive tense? In my opinion, I think cells are alive. They can move by themselves.

Thank you.

 

[Islands]

Your cells can move by them selves but can't decide to jump off you & go to the pub.
However, if you had a fight in a pub & were then arrested, you might say:
'My cells were scattered all over the place. I had no choice' but to admit I was there.

Ah! thank you for adding 'Mastectomy was presented as my only option.'
It seems that the cells were cancerous.