Radiotherapy Breast

Hi there, I’m confused! I am due to have 5 days radiotherapy at beginning of March following a lumpectomy. I had the tattoo’s done this week so all ready to go. My oncologist has just rung me and said I have the option to NOT  have radiotherapy due to my age etc. I’m 69. He said there’s a 1% chance of it coming back if I have radiotherapy and I think he said 10% if I don’t. I’ve chosen to go ahead but why wait till now to give me the option and not when I saw him a week ago. Your thoughts would be appreciated TIA

Angie