Do I drink too much or what?

I'm 74 years old and have been a fairly heavy drinker most of my life. Since retirement, I drink daily , usually a couple of gin and tonics in the morning and beer throughout the day (4-5). At night, I like to top it all off with some a couple of glasses of blended scotch. Aside from occasional indigestion, I feel okay though my doctor thinks I'm nuts to be drinking so much at my age. I quit smoking, eat health, and exercise with long walks (usually to the pub on the corner, it's about 4 miles there and back). What do you think?