I can understand your position, but you don't really offer any alternatives - just "dont use boys"
I think this is actually part of the problem. I used to feel this way too.
For people who are accustomed to using male-gendered language to refer to groups of people indiscriminately ("guys", "boys", etc) it can seem suddenly difficult to find the right way to address a group. I think your brain seeks some kind of specificity ("ladies and gentlemen") even though no specificity is actually required. Much of the United States, for example, already uses "y'all" to address groups of people in a gender-neutral way. This is common among black communities, the American South, and a lot of American youth.
I personally switched to "folks" a year or so ago and now I don't even think about it. I actually liked using "folks" because it sounded kind of jokey, like a stand-up comedian doing a bad bit, but over time I've come to realize how flexible it is. I use it when joking around with friends ("folks, let me tell ya") and at work ("thanks for coming to the meeting today, folks").
Chances are, you're already familiar with a lot of ungendered alternatives that you just don't think to use. Y'all, folks, gang, friends, etc. Some terms, like squad, are already incorporated in to slang for this purpose ("squad goals," "hey squad"). You just have to make a point to use those terms instead. It doesn't take long at all before it's second nature and you realize how easy it was to make the adjustment.