14 units may be an arbitrary guideline but it gives an indication, since the fact is any alcohol has a negative effect and less is better than more. Men used to have a higher guideline - 21 units I think - and that has been lowered to 14, presumably based on evidence of some sort. All this had been made clear repeatedly so I don't see the point in continuing to mentioni it is 'arbitrary' and making it sound like it's a random number with no basis in fact at all.
Assuming 2.5 bottles a week equates to 25 units, and OP is cutting out 2 days of drinking, this would mean she drinks 3.57 units a day on average, which would be 17.86 units over 5 days, which is still over the guideline. I guess she wants to keep drinking beyond the recommended guideline, hence the need to keep making it sound like 14 is plucked out of the air.
Also arguing that everyone else must also be unhealthy in some other way as a justification for drinking too much is not only fallacious but irrelevant. This thread is discussing the merits, or lack of , relating to alcohol only.
As it happens I barely ever drink coffee, never smoke anything, drink fizzy drinks only occasionally, am a healthy weight, regulate my diet as I wish to stay healthy and take exercise several times a week. However I do drink wine fairly regularly, so not a total paragon of virtue!