Expressing opinions: I think ... / I feel ... / In my opinion ... / I believe that ... Comparative phrases (a) ... is (much) more/less important than Y because ... (b) ... is (not) as important as Y because ... (c) ... should have (greater) priority over Y because ...
For example, in my opinion, hospital workers is the most important people to receive vaccine because ........ I think bankers are not as important as teachers because .......... I feel children under 12 should have greater priority over people over 60 because .....