The second Vatican council stated on their decree on ecumenism:
“…though we believe them[non-Catholic Christian churches] to be deficient in some respects, [they] have been by no means deprived of significance and importance in the mystery of salvation. For the Spirit of Christ has not refrained from using them as means of salvation which derive their efficacy from the very fullness of grace and truth entrusted to the Church.”- UNITATIS REDINTEGRATIO chapter 1 section 3 verse 23
It’s like being married and not having joyful relations together.
The Church offers
the fullness of salvation, not a checklist of requirements. And having salvation means, at some point in heaven, attaining the fullness of it. Not just scraping by with elements of it.