I am 62 and am happy with having had surgery so to the "too old" question I say NO WAY. You are still young and deserve a healthier life. You will learn to sip sip and sip some more. You will not be abel to gulp without consequences so you will learn LOL. I did not experience a lot of pain at all, soreness and yes I walked immediately as I was taken to my room after a few hours in recovery. I know being older I had a higher chance of complication so I decided beforehand to do everything and anything the dr ordered and i did. I worked for me. I am one month and change out of surgery and feel better than I had in a long time. Physically and emotionally, I feel I took one of the most important steps in my life and have not regretted it a single minute.
Do not concern yourself with what others think! Say what feels comfortable to you right now. I am having a hernia repaired, I need to have a "woman's surgery" if he is a male boss that will keep him from asking more, I am having a minor stomach procedure, etc anything really. Keep this about you and your health and focus on yourself. Everything else is secondary.