Again... The french revolution did neither require elections nor trade unions. And while your aristocrats will of course not like change that will mean they earn less money in the future, while the poor people earn more (i mean come on they are called poor for a reason...), they will definitely prefer one or two reforms over risking to meet a good old choping block...
The french revolution was the exact example o the nobility pushing things to the limit and then meeting Mr guillotine as a result.
The nobility and clergy famously didn't want to make concessions in the general estates, which lead to the third estate creating the national assembly.
Then, when a constitutional monarchy was going to be established, they still didn't want to make concessions and the king attempted to leave to gather outside support and crush the revolution, which was the last straw to begin the whole guilotinnin' business.
You seriously underestimate what the people in power will do to keep that power.
If the elites would simply roll over reforms whenever the people started getting a bit restless, we would've never seen any strikes, revolts or revolutions after 1815, which has clearly not been the case.
Even somewhat progressive monarchists like Bismark were under an electoral system, Prussia (and then Germany) wasn't an absolute monarchy after 1848.
And more illiberal monarchies like Russia and Austria had to make concessions for elected bodies after situations of widespread unrest as well.
But anyway, that part you quoted was meant to address game mechanics, not strictly history, it has already been stated that elections will significantly boost an IG's influence.
The poster I was responding to had argued for the player including trade unions in the government to pass reforms, and I'm arguing that, while you may indeed be able to do it, without elections unions will have far too low influence, and IGs with higher influence would be very unhappy as the result, becoming a serious thorn on your side because of it.
Perhaps not rebellion or revolutions if you pass "one or two reforms", but if this becomes a constant, it might very well escalate.