The 'women get lesser sentences' in a massive red herring too.
Firstly, criminals are not some marginalised group.
Secondly, you can only measure the accuracy of this if every crime committed by a female and also a man were like-for-like in circumstance.
For example:
Steven gets caught shoplifting, and is challenged by a female member of staff who is 6 inches shorter than him and small in stature. In a burst of anger at being caught he punches the member of staff in the face.
Sheila gets caught shoplifting, and is challenged by a female member of staff who is 6 inches shorter than her and small in stature. In a burst of anger at being caught she punches the member of staff in the face.
The likelihood that both Sheila and Steve enter the same pleas, apologise to the victim, show remorse, have a reason for their actions or bad personal circumstances relating to the offences (shoplifting due to job loss for example) are extremely slim.
Let's says Steve pleads not guilty, taking this to Crown Court, shows no remorse, is flippant and aggressive throughout his trial, and his violence ensured the victim sustained a broken jaw.
And let's say Sheila pleaded guilty, saving the trial going to Crown Court, apologised to the victim, who (due to Sheila being female) came away with just a bruised cheek and showed genuine remorse.
Of course Sheila will get a lesser sentence than Steve. Sentences are not prescribed. There's no chart a judge or magistrate looks at which says:
Aggravated assault: 5 years
Shoplifting: 6 months
And that's what you get regardless.
A fair justice system must always take other factors into account. Custodial sentences in part are there to rehabilitate, so it's no surprise that showing no remorse can land you in prison.
I'll give a real life example - Adam Johnson seemingly got a 'harsh' sentence for sexually assaulting a child (I don't think he got long enough but there you go). It was unusually high for this country, but he played silly beggars by pleading not guilty on all his charges, right up until the Eve of his trial, when he changed the 'grooming' plea to guilty. The judge isn't stupid - he knew this was because a guilty plea would have resulted in Johnson being suspended from the England team, and he wanted to play for as long as he could, then enter his please when it suited him in the hope the judge would look kindly on it. He also showed no remorse and laughed his way through the trial, showing that he was not taking it seriously. Reading the sentencing remarks, the judge rightly factored all this in when sentencing him.
MRA's are either too dumb or too proud to understand this, but it's how it is.