I think it is exact opposite: the fact that pizza is one of the most popular foods worldwide benefits Italians. Any Italian can brag: we invented pizza. Also any Jamaican can brag: my homies invented reggae music. It doesn't matter that much whether a reggae song that you can hear in the radio was made by an actual Jamaican or not. Copying is the greatest compliment.
The margarita probably was created by Raffaele Esposito who had a restaurant and could sell Pizza to a large enough degree to refinance it as the value wasn't in the recipe, but in the exact way the produced it and having an oven and the restaurant and anybody who wanted to sell their versions had to invest in an oven and ingredients and then needs skills to make a better pizza.
However if i record a music album and I have no protection anybody can copy it for free, without any investment and in the current system the original musicians have no benefit as each copy of the recording would be equally well.
Whether that is by sharing the proceeds of the creation, some state budget or whatever is the next question, but we need ways for creators to be able to create while sustaining a proper life, else there can't be "serious" new creative pieces.
And for some works (software, orchestra music, movie, ...) you also need not only one person but a large group with organisation and all.