BernardBlackMissesLangCleg, you quoted my post to make a point about the UK. Which I was not discussing.
The situations are different in crucial ways.
In the UK, at the last election, voters did NOT have a choice between a Trump-like candidate on the far right and a soft left candidate like Biden. They had a choice between a right wing candidate in Johnson who came across as jokey and a nice, normal guy (I'm not saying he is, but that's how he was seen - pre-Covid, his utter incompetence had not yet become apparent) versus Corbyn, who was the one who clearly came across as the extremist, racist, anti-democratic, incompetent loon.
And in the UK, the extremist, racist, anti-democratic, incompetent loon lost in a landslide.
As I've said previously, extremists whether right or left are very similar. Voters in the UK certainly are not big on racists (different story I agree in the US, where a sizeable proportion are actively racist), and no-one is big on incompetence, especially where lives are at stake.
I would count myself as soft left but there is no way I would ever have voted for Corbyn (you will doubtless be surprised to hear).
Maybe a better comparison is Johnson now - now that his incompetence has become more apparent - versus Starmer, another soft left candidate much closer to Biden. It may have escaped your notice, but Starmer has now overtaken Johnson in the polls here.