I will need to play more of silksong to be able to comment fully, but I felt that, even though you could understandably say all the same stuff about Hollow Knight, I still do think that the only times I struggled in HK (on required content) I later found out about an upgrade that was available if i had looked that would have made the fight much easier (nail upgrade, ability, charm, more hp, etc).

No, not to the same degree as Elden Ring, i agree, but I do think HK's exploration played a very similar role as it did in Elden Ring. In both games i would tell people to only bash your head against a boss if you want to hurt yourself, otherwise go explore.