Recently, my interior designer told me that our Condo Management claimed that no allow to hack wall for the kitchen hood pipe, it has to through the kitchen's window (which mean a pipe will be expose from ceiling and passthrough window). I am really concerning with the design, it is quite ugly with pipe expose out.

I had confirmed with management, seem not much option available for me, which is

(1) setup hood with pipe expose --> ugly
(2) opt for ductless hood --> plenty of "ineffective" comment
(3) do not setup any hood --> concern on the ventilation & future.

I don't think we will cook often, maybe cook something light like fried egg, maggie, etc.

Thus, I wonder, is hood compulsory, or with or without hood, it still good as long for light cooker.

Need advise on this. Appreciate for all the advise.

i personally pick 1.
i just believe there's a way to make it look acceptable/not ugly
(depends on placement and design)

Common issue. Likely someone cored a hole through a beam or external wall and put the ugly end cap outside, hence this rule.
I had same issue last time, but I cored a hole after the fact. Ended up having to pay a fine. But the hole stayed.

I guess for some, if aesthetics are so important, and the wall is a non-load bearing wall, then they might risk a fine.

The plaster ceiling guy should be able to resolve your expose pipe problem.