A good deck paint job takes a lot of time and effort. A pro job on a 32 could run close to 9k. A crummy DIY job could cost just a few hours and the cost of paint. You choose the in-between you are comfortable with. And yes, it is just a cosmetic issue. But, like others have said, it could be an indication of overall lack of maintenance in other areas, so be take a closer look at everything else. I wouldn't make it deal-killer if I didn't think the appearance was that objectionable.
Painting in the northern areas is tough. Do you pay for the temp controlled winter storage to paint or take weeks of the short sailing season to make the boat look good?