Haha, this makes me laugh - I love the trotting out of cliches.
Let's just get one nonsense remark out of the way first - it has nothing to do with "a side of politics", or whether someone's "viewpoint is questioned".
I've watched Leigh very carefully over the years, and if I had to conclude whether she was in any way biased towards a particular side of politics, it's in favour of the Liberals. She is a little less forceful with their spokespeople, and a little more pushy with Labor ones. So actually I agree with your observation in that respect - probably a good indication that it's right.
The difference either way however in the scheme of things is negligible.
(Incidentally, this idea that "oh you find her biased", and "oh, this other person on the other side of politics also finds her biased" therefore "she must be doing a good job" is the biggest load of nonsense ever. It's often trotted out in discussions about BBC bias - the BBC is clearly biased towards the left side of politics, but because occasionally some extreme left-wing person (for example, someone who thinks the IRA was honourable in murdering civilians) says the BBC is right-wing biased, this is given as evidence that the BBC must be doing it's job correctly because some people also say it favours right-wing politics. Complete bullshit).
However, not being a biased political journalist is the first baby step.
Her interviewing technique is woeful. It is confrontational, it is erratic, it doesn't allow the guest to either put forward their point (or conversely make a fool of themselves), it goes down rabbit holes too often.
Echo-chambers I agree are very bad for political discourse, and they are usually found on platforms inhabited by the demographics that favour left-wing politics. That's why you'll find twitter a hotbed of echo-chamber left-wing nonsense - not just here, but in the UK (twitter heavily favouring Labour) and US (twitter heavily favouring Democats).
As twitter's main celebrity pulling power is often journalists (of the political variety) and MPs, this echo-chamber that exists on twitter then affects their reporting, and their views. See, for example, most UK MPs favouring remaining in the EU, even though 52% of the country wants to leave. Or, for example, UK media grossly out of step with the 2015 General Election result.
Having said all this, let me now make two logical points, not just for you matlock, but for anyone that fails to understand reasoning and logic.
* Just because I resist extreme far left views (devastatingly nonsense views which result in, for example, the Democrats failing to win the Presidency, House of Reps and Senate), does not necessarily mean I am right wing, or extreme right wing in my views.
* Just because I do resist those views, and happen to think Leigh Sales is not a good host for this programme (which I've said for many years, amidst the collapsing ratings for this programme, and the strong promotional push when for years it survived without any), does not mean it is my political views influencing that opinion.
This is the sort of roundabout arguing that many left-wing loonies on twitter are famous for. You think Hillary Clinton isn't a good candidate? Oh, you must love Donald Trump then. Which then means, you are racist, homophobic, Islamaphobic. Which means of course you don't like Hillary Clinton.
I wish someone would tell these idiots they are normal-people-phobic.