It also depends on where you are.
In the UK you have pretty robust consumer protection legislation. Goods must be of "satisfactory quality" and last for a "reasonable period" taking account the goods in question and the price paid.
Example - a literal apple fruit should be intact and free from major bruises (it's allowed to have some, it is a fruit after all 😛 ) and last for about 2 days after purchase.
A £2,000 apple notebook should be near perfect at delivery (I'm saying near, because nothing will ever be perfect) and last for about 2 years before needing to be disposed of. If it develops a manufacturing fault (NOT including a problem that is your fault, such as accidental damage) within that period return it to apple and ask them to fix it (you are entitled to a repair at their cost, not a replacement). From experience, unless they have a strong suspicion/can show that you have damaged the notebook in some way they will certainly help. If they don't, get trading standards involved or sue them in the small claims court.
Apple Care in that respect will in those circumstances only probably give you an additional year of "manufacturer warranty" so to speak. Whether it's worth it is up to you.