They are. That's what F1 wanted and apparently still wants. There's a lot F1 could do even within that m.o. though that could make the racing more variable while reintroducing a 'push, push, push' mentality and getting rid of the ridiculous tire nursing. But I guess F1 is just too lazy for that these days. They'd rather just fuck around with stupid 'fixes' for shit that's not broken than find solutions for the things that are. Even when they do find productive solutions, they just ditch them within a year or so because a big team or two just can't get their heads around how to make it work and be quick at the same time, and then cry 'safety'.
Can Pirelli produce a race tire that performs well over at least half or even all of a race distance the way Michelin, Bridgestone, etc have done with ease for decades? I don't know, but having owned some myself that were on a new car I bought, I have my doubts. Pirelli tires are ass, my dude. I'll never buy another tire not named Michelin, but if I had to, there are so many brands that are way ahead of Pirelli that they would never even be an option to consider, esp at such high prices.