workplace casual means something different to every person you could ask. It's also worth asking, do we really need to require folks to dress in suits? There are absolutely places that still require that, and should, but there's a ton of places that think they need their people dressed up...but for what? If you're not always customer facing, and you're competing with other companies who offer casual dress as perks, you're definitely going to have a harder time keeping the younger gen on. They've proven 1. they don't WANT to care about why we wear business casual to work, impressing some old white male CEO is not on their to-do list and 2. they have no allegiance to companies - if they can do the same job somewhere else that doesn't make them wear a tie? they will and do jump ship.
They need specific instructions on work wear. I agree, that's sad, I've had to give my assistant a talk multiple times this year. We work in a weird gray area and its hard to dress for this role. If your company has a specific look they're trying to go for, spell it all out for them. But also, really consider WHY your company wants that specific look. Is it just bc that's the way you've always done it? that's a very boomer attitude
that said, hole-y jeans and shorts are an absolute no regardless.