No, you don’t always need a degree to get an employment visa for Hong Kong.
But instead, you have to have a lot of experience in your particular line of work.
The Hong Kong Immigration Department are looking for special skills, knowledge or experience of value to and not readily available in Hong Kong. Not just a degree!
It’s really all about ‘human capital’ and keeping Hong Kong’s economy competitive.
If you genuinely have talent and experience, it doesn’t matter whether you have letters after your name or not!