I can see both sides to this and have discussed it with work colleagues many times.
When I first met my Wife she had her own flat (rented) and had just qualified as a Nurse so fully self sufficient, this was in 1990 mind you.
As we got to know each other I would stop over more and more and eventually moved in, at this point all the household bills were in her name as you would expect so I simply 'bunged her a bit' towards them.
As time went on we decided to get Married and buy a house together (1996) so off we went and the rest is history as they say.
Now this is where the paying of 'joint' bills raised it's head, we obviously had a joint mortgage but all the utility bills were in her name and coming out of her bank from the previous flat so when we moved into the house she just carried on paying them and I set up a standing order for a set amount each month to cover my 'share'.
As time went by my contribution changed to reflect circumstances as she went from full time to part time to full time again to Sister as the kids came and grew and needed less of her time, never once having a joint account in all this time and things working perfectly.
I put this working down to being on an equal, give or take, financial standing to one another and both people having lived alone whereas the lads I work with are all the main wage earners so want to know where every penny of their wages are going.
I remember one conversation with a fella who reckoned my missus was probably 'squirreling away' all the money I gave her and not paying the bills and would one day leave me with a massive debt, I asked him how much his bills were each month and he replied " well, about £1200 and the wife buys the food" we had a similar mortgage at the time and both had 2 kids "I give my missus £600 per month so I doubt
she's making much".
As already said, whatever works for you
My wife and myself had one joint account for the whole of our married lives and both had unlimited access and there was never a problem as any largish purchases were discussed beforehand. We did have separate business accounts but standing orders were set up to transfer an agreed monthly amount into our personal account. This was for tax purposes as the main business was in her name and mine was more of a "profitable hobby" business.