It's true that vaccines are less effective at slowing down delta. They slowed previous variants down by 80% or more. They still slow it down, but not as much. But in the UK we had high vaccination rates before delta hit and in the first 6 months of the year this saved a _lot_ of lives. It's still saving lives by reducing transmission, but now mainly by simply protecting us from the worst effects of the virus.
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It's true that vaccines are less effective at slowing down delta. They slowed previous variants down by 80% or more. They still slow it down, but not as much. But in the UK we had high vaccination rates before delta hit and in the first 6 months of the year this saved a _lot_ of lives. It's still saving lives by reducing transmission, but now mainly by simply protecting us from the worst effects of the virus.