I think the short answer is King James' efforts on the Bible were controlled by Vatican plants to "limit the damage"

https://en.wikipedia.org/wiki/Bible_translations

I doubt it were about bible really. It were serious politics.

Thing is Britain become "protestant" after decision of Henry VIII who created anglicanism simply because he had problems with getting divorces (because he wanted male heir). He ruled about 40 years. Next were his only son.He ruled 5 years. Next ruller were "Bloody" Mary who were Catholic and wanted to make Britain Catholic again.Yes,she ordered to burn protestant dissidents,but let's look WHY she had to do it:

Henry insisted that Mary recognise him as head of the Church of England, repudiate papal authority, acknowledge that the marriage between her parents was unlawful, and accept her own illegitimacy.

Despite the fact she was only lawful daughter from his first and lawful marriage ! From royal and legitimate princess and heir to the throne to almost servant,to bastard by law... Daughter to a queen,become the "bastard" to let the King marry Ann Boleyn ,daughter of simple vice-count in the times when those things about "nobility" were taken so serious... greavious insult i think.

Her father killed already about 500 Catholics.Thing is Catholics were then PERSECUTED in England too. And executed too as we see...

Neither her father nor her brother were doing anything to let Mary her find a husband, she even wanted to run from England, she married at least Philip IInd of Spain at the age of 37. Those invention of "Anglicanism" by her father ruined her life. And she is called bloody because she ordered to kill 280 protestants.When I repeat - her father were responsible for killing over 500 Catholics and "it is nothing". She ruled 5 years only and died because of ovarian cancer or something.

And again Elisabeth I,her sister were enforcing Anglicanism. Of course she were, whole Anglicanism were invented to make her father marry her mother !

Elisabeth ruled about 40 years or more. Fawkes conspiracy were in 7-th year of rule of Jacob Stuart who were of course NOT the son of Elisabeth,but the son of Mary Stuart catholic queen of Scotland murdered/executed at the order of Elisabeth - he were raised as protestant,but it was mostly politician thing again.

It were all about politics and survival,because catholics and protestants were obviously fighting each other and murdering each others then. Come on, 8 years later begun bloody 30-years war which were ruining Europe (especially Germany). All because of religious and politician shit. Catholics simply had hope they would somehow "stop those filthy degenerate protestantism" in England.

Simply Catholics were persecuted side hoping that they would somehow win against "heresy" existing less than 100 years and there were almost as many of them as protestants then. It wouldn't be good for protestants of course,but that were the medieval times where there were no Ecomunism shit and religious differences were taken too bloody (yes: too bloody...) serious to be solved by debates instead of by violence.

So u/Sadness: it wasabout restoring Catholic rule,not just "Catholic on the throne". It was about stopping persecution of Catholics and starting persecution of Protestants instead. King was like president of USA.Alone without support of administration power of the president is quite limited.And so power of the king was. Court officials and house of the lords were those administration then.And that one officials were protestants. Do you REALLY think that such explosion of more than 20 barrels of gunpowder would kill only the king ? No,of course not. Fawkes wanted to blow up whole HOUSE OF LORDS ! Blow up whole fucking parliament not just only king. But as king were most important person there and only assault on the king were treated so seriously he is commonly known as man conspiring against the king.