but you can easily point to plenty that are dysfunctional, anti-democratic, and so on (israel, hungary, etc).

and the functioning parliaments in most western democratic nations require multi party coalition/cooperation power sharing agreements that encourage strict compromise and moderation (which lefties in america abhor). you end up with shit like climate advocates aligning with far right nativists to push a green energy future but also ban burqas and persecute immigrants (american lefties dont wanna talk about this when they claim the dem party is entirely more conservative than european dem socialist nations).

and maybe the most pervasive assumption is that a parliamentary government is intrinsically better for *their* interests. but the multi factional nature of liberals and the various parties that it spurns (center left, socialist, green, etc) makes it harder for all of those to attain power because of the splitting/cannibalizing vs the largely homogenous conservative bloc.

bernie sanders barely won 25% of the votes on the left and got annihilated in states where liberal and conservative vote shares are the tightest. his platform didnt even appeal to the majority of people on the american left. no way to pretend his platform represented the majority of americans. now also imagine if he ran in a parliamentary system where he would actually split votes with a green candidate, and a labor candidate, and a socialist candidate, and a center left candidate...or all of the liberal parliamentary parties other than the one he was representing (assuming he would be a part of one those mentioned). his support would be even more diluted.

i mean...the uk labor party (and 'bernie sanders of the uk' jeremy corbyn) got *annihilated* at a historic level against a historically unpopular conservative candidate. clearly the parliamentary system didnt even work in favor of lefties in a country economically to the left of the us.

meanwhile centrist emmanuel macron in france won his 1st election by a historical margin with a massive parliamentary majority. and then became the 1st french prez in 20 yrs to win re-election.

so nothing these folks believe about this stuff has proven to be a given in reality (and many times is downright unlikely or unrealistic).