That number can't be interpreted without context — how many of the top 100 most highly cited papers are in the Lancet? If it's ~30 then your data point doesn't mean anything.
Papers in Lancet are generally more highly cited than average, since it's the most prominent and respected medical journal. Is it any surprise that even the retracted papers in Lancet are highly cited? Surely that's a function of their visibility.
I'm not sure what kind of conclusion we can take from that dataset. It is only 10 papers and it doesn't take into account the average number of citations for the non-retracted articles in each journal.
I was asked to provide examples of the Lancet's poor track record, which I have done. I am not trying to prove it is better or worse than any other journal.
It's a list of "Top 10 most highly cited retracted papers", not "Top 10 most highly cited papers". Without more information about highly cited papers in general (e.g. what proportion are in the Lancet?), we can't tell exactly how concerning 3 being from the Lancet should be.
A top tier journal has 3 papers with >500 citations that turned out to be bullshit in the last 10 years. One of them is probably the premiere example of academic misconduct in the last 50 years, catalysing the anti-vax movement and causing untold harm. What's your definition of poor?
Would you care to name some others?