Yes, they can. What you are describing may actually fall under what is known as “functioning alcoholism”. It's more common than people think, and just because you're coping with everyday tasks doesn't mean your drinking isn't affecting your health or relationships. I recommend that you read this article:
https://genesishouse.net/blog/functioning-alcoholism/. It explains it very well and can give you a better understanding of where you are. It's worth thinking about even if everything seems fine at first glance.