Agreed. I think even Houston whiffed on a one last night, and Humphrey may have become - at least occasionally - too focused on strips to make yard limiting tackles.
I'd say that 95% of the time going for strips is more important than limiting yards. Exceptions I can think of quickly would include scenarios like when the ballcarrier is a few yards shy of the 1st down marker or when it's a 3rd down on the edge of FG range. But in most cases where a CB is making a tackle, I fully support Humphrey's punchout attempts. Forcing a fumble (which he's proven he's fantastic at) is a much bigger play than several unsuccessful punch attempts that lead to 3 or 5 or occasionally more yards.
I think given that we frequently see him go for the punchouts, that the Ravens decision-makers agree with his philosophy. I really doubt that he's being advised to not do that and just use two hands to wrap up but instead constantly ignores that coaching.