Data from Israel and USA and Norway indicates that mRNA vaccines (Pfizer and Moderna) work well - not necessarily against infection, but importantly at preventing hospitalisations and deaths.
If it is the case that one type of vaccine is less successful at preventing hospitalisations and death (and I emphasise if), the government ought to tell people.
First, because people (particularly but not only the vulnerable) have the right to full facts - so that they can make informed risk decisions.
But also because otherwise it's a huge gift to the anti vaxxer movement in general (not just Covid vaccines). It gives them fuel to the fire... they'll say, 'but, look vaccines aren't stopping hospitalisations, etc etc'... Long-term consequences need to be considered.
Perhaps it's nothing to do with which vaccine. Perhaps double jabbed hospitalisations are very vulnerable people with underlying conditions (possibly undiagnosed) and/or people who had vaccines a while ago and now in need of a booster.
But we need to know. And booster jab those who had the less effective vaccine (if one is less effective).
Even if one is less effective than another, all the vaccines are still worth getting. Data shows risk of hospitalisations and deaths are cut by at least 50% if double jabbed.