Nobody says it is impossible, you can provide goods to other country with EUR but you are competing with other markets. French local company has advantage over

Nobody says it is impossible, you can provide goods to other country with EUR but you are competing with other markets. French local company has advantage over German company that tries to sell good in France because French company has smaller shipping cost (it is not unified through EU), they offer localized goods, they have local visibility, they know local laws, they can provide localized support and these things are hard when you are new company and you want to grow.