Mastectomy this Thursday..

I am booked in for a single mastectomy (followed by chemo and radio) this Thursday. I tried to discuss with my surgeon the possibility of removing both breasts at the same time, one being preventative (as this is what I would really want) but she dismissed it. I have asked again yesterday and she said she wouldn’t do it as it may delay treatment and because of covid, there is a need for beds in hospital.. plus there is double the risk for complications.

While I originally accepted her reasoning, I am now working myself up as I am upset that this option was not fully considered and the reasoning do not make all that sense to me. There are pros and cons of course..

Anyone been in a similar situation and/or had a second mastectomy later? How long after you finished treatment were you able to have another surgery?
I do not want to delay surgery this week, but I also want to do the right thing for myself..