People have rowed across the Pacific, kayaked from California
and beefed up a Catalina
27, so I don't think one can say it's not possible.
However, I own a Hunter 30 myself. I love it for Island cruising, but it's not a boat I'd personally be very comfortable with for a trans-oceanic crossing.
The sail management systems seem fairly easy to manage and strong, it's more that it's just not as seakindly a boat as I'd want for that kind of duration and potential conditions.
Certainly, how a boat is outfitted and maintained can make an enormous difference, but still, I'd probably be looking at something else myself.
P.S. - In response to Skimac's post, my 89 Hunter has a split backstay. I don't know if there were versions that did not. I second his take that they are built for price
and are a great option to consider to get one out enjoying coastal cruising affordably.