I was the same as you when we renovated our kitchen.   We ended up getting a slim line range hood.  I'm glad we did end up getting one.   Mostly for the lighting is good to have when cooking , and there are times when you won't have windows open in in winter and need excess steam to be taken away.  So yes I would recommend one.

If you have cupboard above stove then yes put a pull out exhaust in. Otherwise you don’t have to have one. I rarely use mine but when frying smelly foods or smoky cooking it is really helpful. You can have a ceiling exhaust fan like in bathroom.
The other benefit of a kitchen exhaust is the filter. Without a fan filtering grease if you use lots of oil it will end up on ceiling and cabinets

to add a little more info, ceiling is high - about 3200 and there are no overhead cabinets above cooktop

What sort of cooking do you do?

We looked at a house years ago and wondered about the lack of rangehood, were told it's fine because there's a window, noticed years later when it came up for sale it now has a rangehood.

For people who enjpy cooking, an externally ducted rangehood is best.

For a non-kitchen aesthetic, a rangehood that rises out of the bench might be an alternative but is not as effective. I don't know if there are any on the market which can be externally ducted. If not they have additional filters to regularly clean/replace. I've never understood having a less effective appliance which requires more maintenance if you can have a better and easier care appliance.

I'd really work out first what functionality you require in your kitchen and then get what suits how you use your kitchen. I remember older relatives' houses from pre-rangehood days and they always had yellowed kitchen ceilings. But if you don't cook much you might get away with it, though I'd allow space for future installation for resale value.

As for the building code requirements, check with your council. We've owned/rented various houses with different set-ups depending on the rules at the time and also whether the installers knew what they were doing, for example getting external venting done properly can be fun.

I rarely use mine. I hate the thought of it venting into the ceiling. Next kitchen I’ll have I’ll have a cassette one where the filters can go in the dishwasher. I do have to clean the ceiling and cupboards. I just do the ceiling (3metre +) with a sponge mop and a dishwashing detergent mix.

There are ventilation requirements which are part of the “building codes of Australia “. If your windows can be opened when excessive steam and smoke, and cooking smells are present, then this is the minimum required. So in answer to your question. No you don’t need a range hood system in the kitchen, BUT a ceiling exhaust fan and good ventilation are recommended. Noting that a range hood set up is different to a ceiling exhaust fan. Ideally the exhaust fan will ventilate to the outside, not the roof space. Refer to this article which states the standard requirements.

https://build.com.au/bca-ventilation-requirements

Or this article. https://proluxelectrical.com.au/building-code-of-australia-bca-ventilation-requirements