I forget the age of your boat and where it was built. I suspect from the spidering it was a French built boat as I've seen it far more on British and French boats. Sunseeker was notorious for it until the last few years and no way to know if they'll develop the problem. Some owners ignored it, some chased it constantly with gelcoat, and some got frustrated and painted the boat.
The reason I heard given for the issue was the temperature and humidity during the original build. Was understandable excuse in the UK, but still just an excuse.
Never hurts to ask or insist, but I've never known a builder to cover these issues on a boat more than a couple of years old and typically the issues have become significant on a 7 or 8 year old boat.
my boat is 2 years old and change. noticed it before she turned 2. was only really apparent when the boat was hauled out of the water, very hard to see them all from the dock.