I notice you're refering to JWs in deciding if a bottle of wine a day would be OK. F the JWs. They have nothing to do with your choices now unless you let them. You can select another basis for your decisions now.
On the question you ask, is a 750ml bottle of wine a day OK, assuming its drunk over 5 hours.
1) 5 hours a day of drinking makes drinking a big part of someone's day. 7 days x 5 hours a day = 35 hours a week, or nearly as much as a full time job. Anyone can decide for themselves if that's heathy given all the other things you can do in a day and in a week.
2) A bottle of red wine is usually about 8 standard drinks (where a standard drink is 10 grams of alcohol), 7 days x 8 standard drinks = 56 drinks or 560 grams of alchohol. That amount of alchohol would usually cause long term health effects including irreversable liver disease and brain damage. How you think you feel at the time (eg: no hangover) is irrelevent to your health; what is relevent is how many grams of alcohol enter your body each day.
Cheers!