Definitely not 7-8 stone! Almost exactly 12st, although I hope and expect to be 11st 7lb n the not to distant future. Our kitchen floor is a fairly hard laminate - not really wood flooring. I would expect my stilettos to have plastic tips - the ones I have been browsing certainly have plastic tips - and with the rubber protectors I think (hope) I should be fine.
To be honest when I am in the kitchen wearing them I will mainly be working at the kitchen table, seated in front of a laptop, with intermittent treks across the kitchen to brew coffee or to make lunch - not a lot of walking, at least not on the kitchen floor anyway. I’ll do my practicing on the outside walkway.
I like the idea of my wearing stilettos to work, of having such a flamboyant dress code in my office...