They do vary but I find them less valuable than this. In general, I think they are worth about 2-3 skill proficiencies. I often use feats to get extra proficiencies, usually through skill expert or prodigy. In terms of feats I take with my characters these two are in the top 10. Since Tasha's skill expert is probably the third most often feat I take (after Fey touched and Shadow touched).I view a Feat as worth about 8 skill proficiencies (albeit some skills are better than others).
It also depends heavily on your game though. If your game is combat heavy skills are going to be less important in general (with the exception of athletics an possibly stealth). If your game is RP heavy I think skills will have higher importance mechanically.