Volunteer-run infrastructure is fine, but you cannot rely on it. Can you really blame a volunteer if things break? No. They will hopefully fix it on they own time and dime, and that's good.
Volunteer-managed infrastructure is a courtesy. The fact that it's been reliable so far is no indicator of future reliability.
EU-driven initiative on the other hand supplies funds (15'000 euros, for proper hardware, maintenance and replacement parts) and uniformity: users in spain will have to go through the same procedures and configurations whether they are in italy, spain, germany, france or any other eu member state (does freifunk does the same?)