I agree with this, and I would further add that "confidence votes", where if the vote fails, the gov't falls, are another valuable safety hatch. Budgetary votes are always confidence votes, but anyone can move for a vote of no-confidence if they have the votes. With a majority gov't, this is hard to do unless the majority is slim and a couple people are sick (or "cross the aisle", switching parties), but with minority gov'ts it's a significant risk--the PM can't afford to alienate a large enough number of MPs to falll to a confidence vote, which is literally a ten-minute affair if it occurs. US politics has nothing of this effectiveness.