If your states building codes require that air gap and you havent had your plumbing inspection than you are in for bad news.
If you are using a newer dishwasher that has an air gap or check valve built into it maybe you can get away with it. Check with your local codes.
If no inspector is going to show up and you are doing it yourself.
I have run the dishwasher return as high up into your cabinate as you can touching the bottom of the countertop and then down to your dishwasher connection on your drain. This would eliminate the “ugly dishwasher vent thing” on your countertop
Hey I never told you to do that.
Your sink would have to almost run onto the floor before water from a drain backup could enter your dishwasher and contaminate your dishes. The air gap is there for your safety.
It’s really your decision