While that's technically true also in EU, the salaries are quite directly comparable, because these benefits are a much smaller portion of total compensation than in USA, as the difference between e.g. no employer-provided health insurance and very, very good extra health insurance is simply not that much money in EU, and also because similar job roles offer a roughly similar level of benefits.

Like, if I'm comparing two offers, the difference in money value of the benefits provided by the worst offer (let's assume they're really providing the bare minimum required by EU law) and the best offer is going to be at most something like 10% of the compensation - but the difference in offered salary may easily be much, much more than that.