Horseshoe theory addresses this.
The underlying goal of horseshoe theory is not to create a meaningful comparison between two positions, but an underhanded attempt to demoralise those on the left, and to swing undecided centrists by convincing them that the left isn't really offering the progress that it claims. I think it's also used as a shield by people who are right-leaning but don't want to admit it out loud.
...unless you can find a single good example of a notable left-wing proponent suggesting that horseshoe theory is valid, actually.
But somehow – SOMEHOW – the same people that ask for nuance in everything act as if it would be even remotely plausible that the two most polar opposites of political theory would be basically the same for all important intents and purposes if thought to an end.
It is simply mind-blowing. People looking at something, seeing it is complex, stopping their thinking and just somehow feeling their way to the most empty assessment ever: "probably the same consequencesif you think it to the end". Without even having begun to think their way through it!
But I get it: thinking is nice as long as it is a purely intellectual endeavor but not if any personal moral responsibility is concerned. You might be morally obligated to draw consequences in your behavior – Heaven Forbid!