Yes, for the dummy wallet protocol.
The second you want to double confirm a new address out of a real xpub you need a second HWW.
Discussion
I also like the idea of having a backup HWW, especially a stateless one, Incase your corporate HWW gets bricked.
This has happened to many people many times, especially Coldcards.
Agreed, definitely a nice to have
Some people will say I'm just saying that to hate on Coinkite,
This is not the case - it's just pure fact that has been publicly discussed on Twitter many times - having deleted mine I do not have receipts.
Disclaimer: my old Coldcard still works fine.
Seed Tool does the address gen too